We sold a LOT of R&S revolvers over the years at the North South Skirmish Association Spring and Fall National Championship shoots, plus repair parts for same and we did trigger jobs and general repair on them. If a person's hand was big enough for the grip, it was BAR NONE the MOST accurate BP revolver. I didn't shoot NSSA Revolver matches, but if I did, I DARN sure would have bought one. They really are that good!
With the progressive rifled barrel, that's a real treasure.
OK, the number one part we replaced over the years was nipples, but that's because NSSA shooters shot them a LOT. In your case, I would order a dozen of them. One set of six to replace the ones in the revolver now and the second set of six for quite some time in the future.
The second most common part we replaced were the Trigger and Bolt Springs. Personally, I'd buy two to keep as spares, as they aren't that expensive, BUT other ones made for other revolvers WON'T work.
Much less common parts to be used are in this order, BUT I would strongly advise detail stripping the revolver to see what condition the parts are in it now.
3. Hand & Spring. Personally, I'd buy one and mainly as they are drying up.
4. Trigger. Personally, I'd buy one and mainly as they are drying up and the price is far cheaper than repairing one.
Oh, I would also buy replacements for buggered up screws and ensure you install them with properly fitting screwdriver bits.
S&S Firearms has already been mentioned they are in a grievance period for the old man, but I'd call back maybe once a week, since I'm fairly certain they will stay in business.
Links to Parts Dealers:
1.
Products (ssfirearms.com)
2. (Second page)
Products (ssfirearms.com)
3.
PARTS FOR ROGERS AND SPENCER revolvers (peterdyson.co.uk)
Personally and since I would definitely buy the parts mentioned above, I would have NO qualms about buying a used R&S revolver, should you want one.
Gus