I agree, your best option would be to get someone to make one for you, if you're not good at making one yourself.
The Moby is pretty much the same as the HAB just without the pocket, I think. I'm not sure about the other ones you have mentioned, but I guess they're all pretty much the same. As this type of wrap is basically a long piece of fabric, I don't think there are huge differences in the brands.
Ebay would be another good option for a second hand one.
Sasa