I was also going to recommend Unico, with a link to a good online
underwear site worth trying out. Their goods are quickly shipped, and their prices are competitive and typically less than most other sites - or so I've found. These folks are real retail professionals. They also carry a line of
underwear by N2N, most of which I've found accomodates larger endowments easily and comfortably. These are really sexy things to wear, so if you're modest, you're not going to find any grandpa-drawers here.