I have a Smith Model 28. It was issued to me in the mid 70s when I was in LE, I was allowed to kept it when I retired in 1994. I shot the crap out of it when I carried it as a servie revolver, and still shoot the crap out of it. I'm talking about magnum ammo. I have never broke anything or had to replace any parts. If I was gonna stock parts for one of my guns, the Model 28 would be the last one I'd consider needing them.
I'd recommend you take the funds for those 100s of parts and put them into ammo and enjoy shooting the piece.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071