I've got the exact same question, since the moby wraps are available for about half the price of the hug-a-bubs. There must be a reason for that, I'd think! Unless it's just for the added features of pockets, etc. in the HAB. But I don't think that a difference of $60 is justified just for a pocket!
I'd also be interested in making one (and I found some directions for it online - website called mamatoto) but what I'd need then, is the directions for how to wear it, and what positions work, and how to position bub, etc. Any suggestions?