very old sliding glass door roller needed

This is out of a very large mid century sliding glass door. I just moved into a house & this door was removed & swapped out with a 50/50 nasty fake French look slider & now has a 3" step to go over & only opens about 24". Fortunately the huge beautiful old door was on the side of the house & I want it back in. This roller looks to be the reason it was removed as it is toast. It's housing is 2" wide & 1 3/4" tall with the wheel sticking out just about 3/16" from the bottom. No adjustment etc, just a nylon roller in a c shape piece. The wheel itself is about 1 11/16" diameter. The last 2 pics are what it looked like when it was installed & now where it sits outside against the fence. Tracks & everything else look good, only problem looks to be the roller. it sat behind an h shaped piece of aluminum that held it in place