Parts list for Avstar MA-4SPA Carburetor

I have an Avstar MA-4SPA carb and need the safety washer for the pump discharge check valve fitting. The washer has tabs all around for locking in place. Need a new one but don?t know where to find or the parts number for it.

Thanks for any help.

Jim
RV9A

I ordered specific parts for MS MA-4SPA about a year ago and had good luck with MS at this link . But I did have to call them.

https://msacarbs.com/product-category/carburetors/ma-4spa/

Ok thanks Dennis, I?ll give them a call.