Ok, Im going to build my grandfathers PBM mariner from vp44-45 out of the Mach 2 kit.

Im looking for 8-10 good quality 50 cal guns (resin or styrene) brass barrels if available anywhere.

2 Wright R-2800s, resin or styrene

and some good register ww2 nay aviation decals, shot in the dark but I'd love some VP-44 VP-45 squadron decals.
General ww2 navy/aircraft decals would be nice too

If you have something in the spares box, or some links to good parts I'd be most appreciative.

bump for some help, this is not my native scale

White Ensign Models does some aircraft style .50 cal waist guns. I think they were designed for the 1/72 scale PT boat, but could be used on a PBM. I think Verlinden and Airwaves (?) used to do resin waist guns as well.
http://www.squadron.com/NoStock.asp?item=WE7238

thank you!