Try this one: Han Solo Blaster DL-44 by PortedtoReality - Thingiverse
I'm printing it myself, it's pretty good, probably the best out there, at least on thingiverse. The clearance between some parts is a bit too wide, but I'm printing on a FDM printer, nothing a bit of glue can't solve. I Doubt it would be a problem for resin though.
Thingiverse. has multiple screen accurate, 'Free', STL files of the Solo Blasters, versions from ANH/ESB/ROTJ
It also has the Grebiles if you want to use an Airsoft metal broom handle Mauser as a base.
Thngiverse: (Search Thingiverse - Thingiverse)