It sounds like we both have our challenges with our health but I'm not letting it get me down or keep me down LOL!!
I'll gladly send you the Marlin I have .The printed Marlin is in a very rough texture plastic with some attempt at minor detail but nothing close to what you can do in resin,another thing about 3D printed models is you need to use lacquer primer on it as you can't use enamel paints on it at all(it will never dry) and if you don't prime it acrylic paint won't stick at all.
I did try an contact the designer, even sent pics and a drawing all I got back from him was "I no longer work with Shapeways".
I did find another designer and he is really great he designs allot of conversion parts for carriers as well as deck vehicles ect.I just sent him drawings and pics and now have the fuel truck I have wanted for dioramas in 1/144
Just send me an email with your address and I'll send it asap.
Thanks for everything my friend
David