kado

color me interested.
any support for the Bolex 16/32?

i wouldn't recommend this method because if you dip it in hot water and you're not delicately handling the focus gear, you will most likelly lose the structural consistency of the focus gear where it will distort and bend.
sean sent me two sizes, both differing in a fraction of a milimeter difference in diameter.
the smaller one (he referred to it as #219) was a bit too difficult to wedge in, but the second one (#220) was easier to wedge it and out)
the only issue was that #220 would slip when focusing, so instead of dipping  #219 in hot water, i put some strip of gaf tape (you can use paint tape too) in the inner wall of the focus gear and it snugged perfectly.
its tight enough where it grips the barrel of the lens and doesn't slip at all when focusing but conveniently easy to take it off if you need to.
no messing around with hot water;just perfect.

helicoptersean over on ebay makes custom follow focus.
I've been exchanging messages with him to get a properly fitted follow focus to fit on my iscorama 54.
he has sent me a couple samples to see if it fits.
he's super easy to work with and always answers your questions in a timely matter.
he's sending me a final revision and i should be getting it any day now.
if it works perfectly, i'll report back and that will most like be the model he'll be using for other people wanting a FF for the isco54
 
here's an earlier prototype of an earlier follow focus for an iscorama 54 he sent a couple of weeks ago.

 
 
here's his ebay site to contact him.
http://www.ebay.com/usr/helicoptersean