I got them done with PLA, results seems alright.
Currently I have an interpid 4x5 with enlarger kit which I use mainly to print 35mm and 6x8 films with 2 different lenses 50mm App Rodagon and 105 Rodagon.
To be able to use 50mm lens on the camera I had to build a 45mm recessed lens board which works beautifully now. Yes, I can't change aperture always but fixed that to 5.6 which seems optimal for this particular lens. I have also printed 3 copal 0 lens boards yet to be tested outside and a laser alignment tool which seems ok.

Thank you very much for your replies.