We did quite a few cars over the years with SR5250 plus the SR6500 mid for midbass, so technically that's a 3 way. As far as little mids, not really. When I was there it was easy enough to see what was around for home projects. If you like the look of any little mids they have in their in wall lines, you might be able to call up and purchase them as parts. I'm pretty sure it used to be pretty easy to purchase things like that. Even the SR's (when they were in production) were broken up, just in case someone wanted just an extra set of tweeters. Or 6500 mids to add to a 5250 set to make 3 way. Obviously no 3 way crossover ever existed so they'd need to run active. Even if you wanted to buy a pair of the little puffed poly mids you probably couldn't just run the off the SR x- overs (don't think they were 4 ohm). So you'll be stuck making custom passives or going all active. I had a Zapco C2K4.0 running the pillars, and used the built in x- over to lp the mids/ hp the tweets. The other downside is that there aren't any grills for them.I have SR6500 in my car right now and keep on thinking of getting a midrange in between that set... Any recomendations since u're running same set and already did all the legwork there?
I think these might be the mids that were in my pillars