There were two stores in my area last year who had cupido. I've never seen wavrini in person but it's nice to hear they've been available. Usually both Biotodoma get lumped into cupido by LFS, much like Geos are all surinamensis, etc.
I had a group of wavrini for about 1 1/2 years and a heater malfunction while out of town killed them. Great fish and I will probably get them again someday.