Sliding glass door tandem roller replacements

I ordered item #81-149 and had to return them because they did not fit deep enough into our existing sliding glass door. I was about to order the reverse mount ones but in looking at the picture these appear to mount entirely outside the window. Our current rollers are the same as the 81-149 except the end flanges that hold the unit in place are slightly curved instead of being flat which allows the unit to sit slightly inside the mounting hole. Our door is a Jen-weld and was installed in a 2001 Valley Quality Mobile Home.

I have been checking the Swisco site periodically but so far have not seen the roller I need. Just following up to see how long it will take for this roller to be available.