You can try e-gunparts.com or have a machinist/gun smith make them.
No sn data
About $65-$75, depending on condition.
This model of shotgun is identicle to a mossberg 395. You can still purchase clips for this model online or at gunshows. There are 2 round and 5 round clips availible. Just search for the mossberg 395 clips.
This gun is the same as a Mossberg 395. It probably won't be worth what the new stock costs but the parts are the same.
If your Revelation is a bolt action 12 g shotgun, these were made for Western Auto by Mossberg as their Model 395. There is little information on these, but they were made from 1964-1983. If your gun has a serial number, it was made after the 1968 Gun Control Act- serial numbers not required prior to that. Sorry we can't narrow it down than that.
It' a Savage model 94D
Your revelation R310C western auto shotgun is a Mossberg model 500C which was made by Mossberg and Sons for Western Auto.
It a Savage model 30H
It a Savage models ... 30D, 30E, 30F or Stevens model 67
Which Model?
Springfield
Not much, $100 to $120.