1950's Glass patio door roller assembly

I've attached pics of a roller assembly, roller and axel from a 1950's 8ft double slider (both sides open & close). There are no markings of any kind. The wheel is 1.25" in dia, .25" wide, and has a center hole of .25". the axle is 11/16". The main body of the assembly is 2 13/16" long and 1 3/8" tall. All four assemblies seem to be in good shape and probably only need new wheels, but I would possibly like to buy 4 complete assemblies if you can identify them (and have them). Otherwise I would like to know what the difference is between using a steel wheel and a stainless steel wheel, if I am to replace only the wheels? I am in the Los Angeles area, but not near the beach (if any of that helps). Thanx!

It seems I've stumped every place I've checked with on finding this roller assembly. I ended up ordering the 81-241 wheels and the 81-304 axles. My only concern is that the new axles are tapered on the ends, but I guess I could reuse my existing axles if needed. The assemblies themselves seem to be fine, just the wheels are stiff. I'm over 50 yrs old too, and I'm also a little stiff in the joints. LOL. Thanks!

Sounds like a Bur-Val door. Most of them have Bur-val stamped on the outside handle.
81-250 should work.
Some models will fit a 3/4" wide roller that I like to use (not in your catalog), some rails are too narrow.
See picture to remove center screw port.
Viewed from top down.
Some have this type of notched interlock rail, some are flat.
Simply snap off with pliers.
Sorry for my meager Paint skills.