Urethane o-rings for several PCPs

I want to order all the urethane o-rings at the same time and gathered this information so far. What am I missing? 



FX Impact and FX Crown:

https://www.airgunnation.com/topic/impact-o-ring-list-corrected-with-links/

C3 (also A31)  O-ring 2,9×1,78 PUR 90

B23 O-ring 2,84×2,62 PUR 90

A31 (also C3) O-ring 2,9×1,78 PUR 90



Taipan Mutant:

6.07 x 1.78 -010 Piston reducer *Buno 70 polyurethane*
2.9 x 1.78 -006 Piston reducer *Buno 70 polyurethane*



Daystate Airwolf:

Piston O-rings: (AR, AW, MK4, HM RGL)

006 Urethane A90 or BS-111 Urethane A90



Airgun Technology Vulcan:

Did not find any urethane o-ring parts



Crosman 600 (not PCP):

Valve body and piercing cap seal to inside of tube, both are 113 duro 90

Hammer seal to valve is 014, duro 90

breech gasket (square o-ring: size and material and duro rating?