Bras.
I wear a bralet most of the time, but for certain needs I found it really worthwhile to go for a fitting at a bra specialist. Victoria's Secret has a number of T-backs and bras with straps more closely placed to the spine that might work. I find working with a fitter when I have something specific really helps. They know the merchandise and can save a lot of running around. Nordstroms, VS.... good places to go for bra issues.
2015 Liv Intrigue 2
Pro Mongoose Titanium Singlespeed
2012 Trek Madone 4.6 Compact SRAM