Just thought I would add some prices to this thread, for parts that I'm looking to get:
The first # is from the Parts Diagram, the second is the part #. These are for a .22 Mrod:
#27: #1763-020 (Barrel Shroud Spacer) $ 6.65
#34: #JTX-080 (o-ring, 2-113) - $ 1.15
#35: # " " " " "
#10: #1763A023 (o-ring, 2-009) $ 6.68
#38: #397-036 (o-ring, #2-016 BUNA N) - $ 1.15
#39: #190B-008 (o-ring) $ 2.02
#11: #1761A023 (o-ring, #2-009) $ 1.15
#29: #130-036 (Breech Gasket (2) ) $1.15
#3B: #1763-026 (AS568B-118) $1.15
#5B: # " " " "
#2C: # " " " "Man, they are proud of some of these o-rings.
Getting two of each needed, to have spares, puts the total at about $40, without the Barrel Shroud Spacer. I know $20 isn't that bad for a replacement set, but the $6.68 one came as a bit of a surprise.