+1 Jeans shopping sucks BIG TIME. Shopping for computers makes my eyes cross.

If you have a bra you like, maybe try Amazon? Yes, bra shopping is awful. I wear sports bras as often as possible. I've been getting these Fruit of the Looms from Amazon that are like a sports bra but with spaghetti straps. I'm smaller than you, so I don't know if they would give you the support you want. But they're like 3 for ~$15 & that includes shipping.