I've never grown these, but they sound so interesting, I'll try some next year. Thanks for the hint. Here are the one's I'm considering (I'm leaning toward a mix):
Red Mini Bell Pepper from Baker Creek
Yum Yums Mix from Gurneys or CalHybrids
Bangles Blend from High Mowing
Cupid from Johnny’s
Mini Belle Mix from Thompson&Morgan or on Amazon
Sweet Golden Baby Belle from Burpee
Mini Belle Mix from Totally Tomatoes
Miniature Yellow Bell from SeedSavers Exchange
17 different varieties, many mini bells at Siegers Seed Co.