Hmm. What do you mean by not worsted? A blazer should be made out of a worsted cloth. Were you thinking of a woollen flannel? That would make for a very odd blazer. Just wrong, actually. If you want a cloth suitable for a blazer with more texture, checkout hopsack. You will not find a RTW navy blue suit with patch pockets. Just isn't out there. A three-roll-two front is also rare. If you are stuck doing RTW, look for a navy suit with double vents with flapped pockets. Then, if the buttons aren't so already, switch them to brown horn. That will suffice. Otherwise, the only way to get a BlazerSuit like you describe is to get it MTM or bespoke. Don't worry about that if money is an issue. The flapped pockets will be fine. Uhh, I'm sure there are colors and patterns to avoid that wouldn't generally apply to all shirts. At first blush, I'm not sure why you'd think about a buttondown-collared shirt that much differently on account of the collar alone. I guess I'd avoid white.