I have a quantity of most of the hard to find head sizes for the pre 1964 Trixons. 363mm(14 3/16")( batter and snare side) ,418mm(16 7/16") 426mm(16 3/4"), 500mm( 19 3/4") and 550mm.(21 11/16")

These are all Remo heads , brand new and of various formulations.

I do not have any 233mm(9 1/4") heads for the alto tom. The 333mm tenor tom is within a hair of being 13", so standard 13" heads will normally fit.

P.M. me if you are interested. I can send you formulation choices and prices. These will be shipped from Canada.