mixet cartridge indentification? thanks!

[papalokey]

I have to replace this mixet cartridge and I cannot find it anywhere, I went to http://www.brasscraft.com/PDF/SP-0341_ServiceParts_Catalog_Stems_By_Length.pdf which has a bunch, but doesn't have the short one I need in this picture. The long one was the one I got from the store, it is too long. The new one is 88200 Danco Cartridge for Mixet Compares to Mixet ms-5at-c. Anyone know what or where I can get this short one?

Thanks in advance!

 

[papalokey]

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