Hiya!
Aeromaster made at least two sheets for 91st BG Forts. Sheets 48-415 & 48-416 allow you to build four different B-17's, all of which are olive drab over grey. (Ships are:
Little Patches,
Man O War II,
Just Plain Lonesome and
Pist'l Packin' Mama)
There was also an old Microscale/Stupidscale sheet (48-59) that included markings for three 91st B-17's, also all in olive drab over grey. (Ships are:
Witches Tit,
Eight Ball and
Little Patches)
If I had dupes of these, I'd offer them to you. But unfortunately, I don't. You may still be able to find the Aeromaster sheets at http://squadron.com/ or other online shops. You may also be able to find them at shows and perhaps a hobby shop, if you have one near you. I can check to see at my local shop if he has these sheets. That's where I picked mine up and hopefully he'll still have more.
Butz, if you read this, you may wanna check with Ron as well, in case I can't get up there this week.
Fade to Black...