Several years ago, someone referred me to this company. The #1 Source For Bearings, Seals, Cables, Carburetor Rebuild Kits & More | All Balls Racing
I was told (but cannot confirm) that their CV boot kit can fit the B&T joint by cutting off one of the bellows. I bought one but never got around to trying it.
The part number(s) on the box are: 19-5008 another number on the label is BO19QFHRZA