Sorry - yes, Greg is right. (On the same point that I've ignored twice in the last couple weeks.)

There is a specific authorization to use equivalent parts (or whatever the language is). I was focusing on Andy's use of "...similar dimension and function - including weight" as defining what is allowable under that provision.

Kirk (who's used a six-pack of aftermarket front fenders on the Golf, not all of which were purchased by Mr. Amy)

:P