Just been looking through some old parts books from when these car were current and the part numbers show as only fitting suds/33's - nothing else had the exact same size gaitors, inner or outer so it is more than possible that manufacturers no longer make ones to fit our cars as it wouldn't be worth it so they probably retail the nearest equivalent as the same item, hence the problems some of us are having....
According to the AP Lockheed book (1991) the part numbers were:
Outer = TBJ2000
Inner = TBJ2400
Steering Rack = TBR3000
All the books give no dimensions though which doesn't help......
Incidentally the Alfetta shows a different part number for the Inner/outer to the Suds/33's even though they are often listed as fitting all, well inner anyway... (book shows TBJ2003 & TBJ2002) so according to the books I have here the sud/33 gaitors if correct should be a one off size