I'm 5' 10 amd about 220. Yes, I still have a bunch of weight to lose around the midsection. The Xtra large Garneau Jerseys fit for length and chest OK, and are a little tight around the midsection of course. But that made me think about the bigger guys, especially the taller ones. IF the extra large fits me, the taller guys must have a hard time getting something to fit in length without being baggy also.
Performancebike.com also sells bigger jerseys. I'm 6'1", 250lbs, 51" chest and their 3XL is a "relaxed" fit for me, long enough and roomy enough to hide the extra "contours". Arms are a bit snug, but not uncomfortable. Snug jerseys just aren't pretty on larger riders like myself.
I'm not positive, but I don't think the performancebike.com house brand clothing has team logos either. But they might have something on their website...