I just have a few corrections after coming back to this list:
Poppet Oring is 013 urethane
Lurker Bolt Spacer Outer optional is a tank oring which is 015 urethane 90
Lurker Bolt Spacer Inner is easiest with an 015 urethane 90
Team Series Front Bolt Oring - Custom Dyed 017 urethane 70
Team Series Rear Bolt Oring - Custom Dyed 015 urethane 70
Another couple things to add is that the ideal material for any bumper is VITON. It has the best rating in compression set tests. I'd recommend them in the following applications:
Bolt Guide Bumper - 012 Viton 75
Boss Bolt Bumper - 015 Viton 75
Oddly enough, boss uses urethane bumpers ~90duro which are rated towards the bottom in testing.
Another couple options is that 1.5 x 11mm Urethane Bolt Guide orings can be sourced here: http://www.allsealsinc.com/
The price seems to roll-off in orders of 100+.