I have a pair, and had no idea they were offered in the unfinished state. I thought that was more of a Jensen thing......... I have a pair of Jensen TR-10U (U=unfinshed).

ALTEC LANSING Monterey Jr Vintage speaker No Reserve | eBay

The Monterey Jr. has that surroundless tweeter........ 2000B, or something like that. I can't recall what the woofer is, but I've seen both components bring decent money on ebay.