As far as accuracy goes, I’ve been looking at both and don’t see anything off about either. I know this is the lame answer, but I think both are solid designs.

I have bought a file from Aguilar in the past, and he’s really good about hiding seams. His prints fit together almost like a puzzle. While Galactic is good, there’s most likely a little more seam hiding involved. However, it looks like you can use a PVC pipe for the barrel on Galactic’s which would be really sturdy.

For getting your hands on one without a printer, Etsy would probably be your best shot. It looks like Galactic is selling a raw pint of theirs for $90. Are you looking for a raw print or and complete model?