A wrap is the first thing that comes to mind since they come in varying lengths and ATB can special order a different length if needed for you (see this link: http://store.attachedtobaby.com/didymos.aspx) ...unless something has changed. Angela or one of her wonderful staff could confirm that for you.
Some of the Mei Tai carrier vendors will let you special order longer straps, so that might be an option as well. I know I just ordered a Baby Hawk and as one of your options, you could get longer straps. (www.babyhawk.com) ATB also sells many Mei Tai carriers, so you might check them out and see what the lengths are on their straps.
I'm not sure about the ring slings, but I am sure there are some that you could get that would be long enough for you. ATB also sells lots of these.
I have personally used the on-line chat here at ATB on a few occasions and they have always been of great help to me. You might want to take a few minutes to chat with one of them when they are on-line. You could give them specifics about your measurements and they could guide you in the direction of what would be most comfortable for you.
HTH!!
Oh yeah, and I have since learned from joining this forum, that Baby Bjorn's aren't the best for babies because it doesn't place their legs in the optimal frog leg position. See below information from www.didymos.com about the frog leg position:
Anatomic examinations by Prof. Dr. Dr. med. Büschelberger (Dresden) have shown that the head of the thighbone in a newborn is ideally orientated towards the hip socket - and thus fills it out evenly-when the legs are pulled up to approx. 100 degrees and spread approx. 40 degrees at the same time.
When infants are picked up they take up this posture spontaneously and therefore it has to co-operate with their anatomic conditions.
As well, the rounded back (kyphosis) doesn't stretch out immediately after birth. On the contrary, the well-known double-s-form of the spine is developing fully at the beginning of self-supported walking.
These anatomic conditions, together with the palmar grasp reflex of the first days in life, suggest that infants are especially adapted to being carried on our body.
Thus, it is possible to make a statement about the ideal carrying position: with wide-spread, flexed legs, slightly rounded back and orientated towards the carrying adult.
There is also the divergent opinion that says that children should be carried in a lying position during their first weeks in life. Make up your own mind, ask your midwife, your paediatrician or let your baby decide if it prefers the "Cradle" or the "Wrap Cross Carry" in the beginning.