Replacing sliding window glass Q?

[dcasalena]

subscribed, I need to replace the same section on mine. PO did this already but stuck in a piece of tinted plexiglass using grey silicone caulk. It looks like crap and really stands out because I took off the tinting from the other 3 pieces of the slider before realizing this last piece wasn't a removable film.
I wonder if these mobile windshield replacement guys would do it? I'd try it, but I haven't seen anywhere to get just a segment of the slider glass, only complete slider window units.