help I need this

Are you shopping for restoration originality?

Cuz for functionality, it matters not, what it looks like.Almost any M/C that will physically bolt on there can be made to work, on your car.If it happens to have the same bore size, that's a bonus.If it's missing a residual valve, I wouldn't worry too much about it, but if it's in there,another bonus.Inline R-valves are available separately. It is possible to pirate the R-valve from your original M/C. If you cannot go that route, you can have a look inside your W/Cs and if there is a spring in there pushing the cups apart, then the R-valve can be considered redundant anyway.
The M/C can look pretty grungy rust wise, internally, yet,after honing, work fine.I can think of just two reasons to replace the M/C due to rust; 1) is if there is a large amount of pitting in one exact spot, such that when the piston seal travels over it, that the fluid bypasses it, or 2) is if the pitting is heavy enough that the atmospheric seal at the firewall-end leaks.
Otherwise good luck in your search.