I don't think TD engine covers existed. TDI does, but B4 and MK3 are fairly different.
That said I have a MK3 one.
I'm fairly certain I've seen them on TD B4's
I'm fairly certain I've seen them on TD B4's
I've had numerous B3/4 and MK III AAZs. None have had a cover nor was there any evidence (mounting lugs) of there ever being one. Maybe there was in other markets but I would agree with Tyler.
I've owned numerous ones as well, never one with a cover.