OK, since there appears to be a degree of confunglement here about the spares situation and the ROA, this is the skinny direct from Sturm, Ruger etc from three years ago, bearing in mind that the ROA - the MOST-bought single-action BP revolver of the modern era ever - was discontinued in 2008.
1. I bought the very last FOUR stainless steel receiver screws in existence, at $6 each.
2. There are NO nipples.
3. There are no cylinder base-pins.
4. A noted above, there are positively no parts that are not common with the Blackhawk/Super Blackhawk.
I asked about Ruger's 'policy' of supporting their products for a ten-year period after cessation of production.
There was no real response to that.
There IS, however, some good news, providing that all you want are replacement nipples. 'Uncle Mikes' of Oregon make perfect replications for a measly $20 or so.
I've been getting mine from that famous store in Springfield OR [Hi there Jim and Suzi] for my pals here in yUK. I strongly advise you all to do likewise.
Tell them I sent you, eh?
tac
PS - this subject has been the basis of a long-standing and fractious thread in this forum a while back. It might be worth the OP having a look at it to get the feeling of just how P***** folks can get when the best BP revolver ever made gets the worst service ever from its makers.