I've used Big Tot. Got both short and long-sleeve onesies, and they are very good quality. I am currently waiting for some long-sleeve fleece onesies that she made for me. They are supposed to arrive Monday (given the current cold snap, I could have used them this weekend). By the way, she also sells adult size pacifiers and has some for under $10.
Hopefully if my pay is enough I'll be ordering one through Nora, she has been really helpful and insightful so far