Oh, the woes of searching for parts.
I had an engine/transmission swap to my 102A3, but I realized later that I have no reasonable way to change or check the transmission oil. There's an extension for the three axle buses (attached) and I have called all around trying to find one.

According to the parts manual, the dipstick and assembly are 13J-10-22 and 13G-10-48
I've tried US Coach and Sam Caylor and the vintage parts partner with MCI (vpartsinc.com) - though they don't seem to have much of anything... I know about Ted in Williams, but he doesn't really ever have 102 parts.
So.. there's got to be a graveyard somewhere with these buses - anyone know where else we can get parts *in general*?