Look on eBay for screws. Also check with SARCO. They sometimes have Victory parts. It is possible to salvage buggered screw slots by pounding down the upturned areas with a hammer and punch.

You did very well at $650 for all you got. Now you need to find some WWII issue Remington ammunition. It came in standard civilian boxes, not military, 158 grain steel jacketed bullets, copper plated. Box is easily identifiable as it has no index number printed on the front. Headstamp is the standard civilian REM-UMC 38 SPL. Cases have no cannelures. Tracer ammo was also very common for use in Navy-owned Victories, but a box of WWII .38 Special tracers can be VERY hard to find. But it is not too hard to find single examples with red bullet tips.

Could it have been used by a Naval aviator? Yes. That was one of the Navy's main purposes in procuring them. The idea behind issuing the tracers was so that the revolvers could be used as emergency signaling devices by downed flight crews at night.