KTM/Magura Clutch Master Piston Retaining Washer

It turns out you cannot buy this by itself, you have to buy a $70+ rebuild kit to get this part.
This is the retaining washer used to keep the piston in the Magura master cylinder used on KTM and other motorcycles. There were 2 types used, one was a plain plastic washer that had a c-clip to hold it in. This one is the other kind that has tabs on the edges of the washer and the washer itself snaps into a groove in the master cylinder.

I know for a fact it fits a 2013 KTM 200 XC-W. It w