There are few options for projection lens most of them are big and heavy i have one it is 5 lbs that paid 100 but using it is not practical at all, it is to big and you would need some support for it.
Anamorphic shooters guide which i have tells you to stay away from those big lenses what i did in my case is to and what guide recommends is smaller projection lens like kowa or sankor 16c EOSHD Rating for sankor is - 7/10. But better quality lens you find on ebay are wayyyyy overpriced.
I have sankor 16C lens it is small there is even smaller like bolex anamorphic but they are like over 1000 but sankor 16c is just fine it can be supported by your Camera body
If you are interested I have Sankor 16c for sale with 52mm clamp and hellios 44-2 lens i am asking 350 plus shipping i believe it is good deal since sankor alone on ebay runs for 500 then you weould need clamp another 50 to 60 dollars and hellios is about 30 to 50 dollars. Why hellios it is really nice look with sankor is it old Russian lens and it is build like a tank with no to limited vignetting.
email me at johhny003@gmail.com if interested
I was about to post the lens on ebay when took a detour and seen your post
Images of lens is in good condition and glass is in awsome condition it cones with fron cap and diy back cap