"The wheel cylinder that are coming off are front 1 1/4 & rears are 1 3/8."
CJD,
On my '36 pickup the front and rear wheel cylinders are different sizes but they appear to be machined from the same casting. So you can probably make "new" 1 3/8" cylinders by boring the 1 1/4" cylinders in a lathe. Just as in boring an engine cylinder the last cut will be very light to give a nice surface and the final surface can be made with a wheel cylinder hone. I'd give that a try.
I encountered stuck wheel cylinder pistons when redoing the brakes on my wife's 1961 Mercedes 190SL. Penetrating oil made from a 50%-50% mix of acetone and atf and a big clamp were able to removed them no sweat. That may be worth a try.
