Tom, I have a couple sets of the speakers that will fit in the rear ¼ I found a couple sets of rear shelf speakers on E bay. I could not get the rear ¼ speakers to work in the shelf, there is a bracket welded to it and when I tried to cut it off the vibration from the dermel blew the thin paper out on the edge of the speaker. When that paper or maybe foam on the outside edge is gone then the speaker will sound blown. Tom I will be happy to part with one set of rear ¼ speakers for you. But you have to promise not to call your 85 a “winter beater” that just tears at my heart………LOL