96 740 rear deck

My dad's 740iL has the cheap stereo in it, and doesn't have any rear deck speakers, so I'm looking to upgrade for him.

What would be the best bet for getting the rear deck cover with speaker grills in it? Would I be better off trying to find one from a junked 740, going to a dealer, or trying to get one made/make it myself?

Actually, for that matter, did the 96's even come with speakers in the rear deck?

Thanks.