This may not help the OP much, but just to give others some additional reference - I'm 6'4", weight ranges from 220-240, waist ~38", chest 46", 34" inseam, and the following fit me very well:
- Pearl Izumi Attack Bib Shorts (w/Select fabric) - XL
- Descente Strata Endurance Bib Shorts - XL

I also recently bought a pair of Giordana Laser Bib Tights (w/pad) - XL, for cooler weather that fit me perfectly. A very nice feature of these Giordana's, that I found out after purchasing them, is the front pulls down really far (by design and unadvertised) allowing for much easier bio breaks without going through the hassle of taking your jersey off, etc. I understand their bib shorts also have this feature and I'm planning on getting a pair in the coming months. I'm very impressed with the quality too - Giordana's quality/price is sort of middle to middle-high - above Pearl Izumi, Garneau, etc., and below Assos, Voler, etc. I expect to get many seasons out of the Lasers.