Buy any solo seat you like and send it to meancitycycles.com to have it adjusted to your body/weight/height. It will be worth to you thousands more than any other.
I just ordered a danny gray big seat for my road king...I liked the look and am hoping it fits my frame ok. you mentioned a backrest...is this a danny gray or corbin?
If you haven't looked lately Mustang has the '09 touring line on it's web site as of yesterday. I'm trying to decide on a solo with pillion (for when my wife rides).
I love my Brawler but wanted a backrest. Used a Mustang backrest and some of it's hardware and had some other brackets made up to get this. Actually works great. If I had the option of getting the C&C seat with the backrest (they didn't make them then) I would have gone that way I think.
Jerry