Si-tech Inflator Service Kit Or O-ring #s?

[undrwater]

I"m trying to service my drysuit Si-Tech inflator (failed o-ring), but having difficulty locating a source for the service kit. I've found a couple of kits online in europe, but nothing here in the US. Not even @Dive Right In Scuba has them listed that I can find.

Failing that, does anyone know what the o-ring sizes are for the spindle? Based on the picture of the kit here: Service kit - Inflation Valves - Products - SI-TECH

It looks like it takes two different sizes.

Thanks in advance.