I've heard good thing about the rode lavs and priced quite competitively but i've not used them myself. 1 of the selling point being the micon connector which is similar to the microdot connector used by DPA. These connectors allow the capsules to be used with different wireless systems which mostly have their own type of connector to plug into the transmitter. However some users prefer to cut the micon/microdot connectors off and solder the connector needed directly onto the wire because the micons/microdots can cause problems.
OSTs (oscar sound tech) are also very good value.
My personal favourite is sanken cos-11 and DPA 4060. These are both quite expensive but have their advantages. All of the above mics can be bought with their own power supplies OR a connector for your wireless system (which you can also plug into a seperate power supply (this starts to add up but does give some contigency).
A Sony ecm 77 can be picked up second hand fairly cheap and when new have nice long wires (try bblist.co.uk).
If the capsule has an XLR connector on it you will need to get an adapter cable (XLR female to minijack male) to plug into your zoom or panasonic.
Something else to consider:
A reasonable but cheap wireless mic system (like sony UWP or sennheiser g3) will introduce some transmission characteristics (compression artifacts and reduced bandwidth and will need batteries) BUT they have limiter circuitry and more importantly will allow you to monitor the recording (they both have HP O/Ps) in a way that placing a zoom recorder in the contributor's pocket will NOT allow you to do (unless you have a very long H/Phone extension lead).
I suggested on your earlier thread (Searching the ultimate versatile microphone (Panasonic GH3)) that the Soundman binaural mics might do a job for you and i still stand by that. They would NOT be easy to convert for wireless use (and i'm not recommending that, but if that is what you decide to do you will loose 1 leg/stereo), but if did go with the 'zoom in a pocket solution' (cheapest and lightest) you would at least have some redundancy and you could record 2 different sound levels by placing one of the capsules nearer the mouth (if they like to whisper or its a noisy environment) and the other capsule lower on the torso in case they shout or you want more ambiance. Or you could place in a similar position and give yourself 2 chances of avoiding clothing noise etc. And as their primary use is to record stereo ambiances (in a very stealthy way) you can go about the rest of your filming (GVs etc) with the minimum amount of junk attached to the camera.
Not that this qualifies my opinion any more than the next person but i say all of the above as an owner of (disclaimer):
6 x sanken cos-11s
2 x lectrosonics 411 wireless channels
2 x sony UWP wireless channels
1 x pair of classic soundman OKMii A3 xlr (binaural mics)
1 x sennheiser 416
1 x sennheiser mkh60
1 x sanken cs3e
1 x sanken cub-01
1 x pair of matched AKG cardioids
2 x pairs of sennheiser hd 25s
1 x pair of sony 7506s
1 x pair of etymotic er4s
3 x rycote windshields and suspensions
1 x sounddevices 302 mixer
1 x busman modified tascam dr-680 recorder
1 x zoom h2
1 x roland r26
1 x sony pd100
1 x sony nex 6
3 x nikkor ais lenses
1 x tom board track bike
1 x giant cyclo-cross/touring bike
1 x 20" wheel tandem
1 x burrows ratracer SL (recumbent)
1 x very full garage
1 x very patient partner :-)