Brembo master cylinder rebuild?

So my MC has a leak.

If I get on the brakes hard the lever is solid however if I'm just barely squeezing the lever it will slowly drop all the way to the bar with out stopping the bike.

I cannot find any rebuild kits for this MC and I've talked to a rep at Kurvey Girl and they said that Brembo doesn't sell seal kits for this MC and even if they did I would need a pin wrench to orientate the piston correctly.

Has anyone rebuild this MC?

If not what MC should I replace this one with? Most of the used ones are eBay are pushing $300 and for that I could pick up a new one.

Got a 19RCS on the way.

In the mean time I figured I'd make a short video showing the symptoms of a nicked primary cup.

RCS 17 is what was recommended for M50s for some reason Brembo discontinued it and replaced their website with RCS 19.

“17RCS to be installed on twin disks bikes with axial or radial calipers whose pistons diameter is 32mm or lower, but NOT on Floating Calipers; for example Ducati Panigale or RSV4, Yamaha R6 etc etc”

M50 has 4x 30mm pistons