FX Royale 500 Seal Kit

Anyone know where to purchase complete oring kit for FX Royale? I have the exploded parts view of the Royale from the FX website and it does give oring sizes ,but they are difficult to find! I've used McMaster-Carr and oringstore website for my sources ,but can't quite find a few oddball rings. I guess any info on other oring suppliers that people have used would be greatly appreciated. I have emailed AOA and other suppliers ,but currently still waiting on responses from them.

Thanks!
CJ