Many thanks for the good idea. Unfortunately their web site outlived the rejuvenated company. That's where I went first, but their phone and email are shut down. Very sad. I might try calling the 10 dealers to see if any inventory is left. Worth a try.

I still think it "would be nice" (even if very difficult, as gonk suggests) if someone built a tunable center speaker for systems where the fronts are set. Oh well.