I'm in a similar boat. I'm 6'6" and having a tough time finding gear...but 6'8"....wow.
If you ever sell any of your gear, lemme know first :)
In the event that you do have to sell, I think you'll be able to sell it without too much issue. Finding something that fits the few tall people is like gold to us, so we snatch it up quick for a decent price.
The Wings EXT has been recommended to me as well, but it is not for mains > 150...) If I can't find anything affordable to re-harness, I'll order up something new this fall. Just gotta decide on reserve/main size...then get a nice fitting harness!