I haven't tried Red Hot Dancewear, but I have custom ordered unitards from this funky little place called Decent Exposures!
Decent Exposures--100% Cotton Comfort Designed by Women for Women
Don't be put off by the downhome look . . . they will build it the way you want it . . . choose the fabric, sleeve length, leg length . . unitards and leotards AND you can get leggings.
They aren't cheap but their stuff wears very well as the fabrics are good . . . well, I always get cotton/lycra. I've bought their bras to use as sports bras . . . to me they are a bit heavy for everyday wear, lol.
Did I mention you can get different colors too??