I gave up on Endura a few years ago when I tried one of their waterproofs and while the chest fit was fine, the body length was fine, the arms were for someone significantly shorter!
Oddly enough my cycling wardrobe is a right mish-mash, shorts wise I can fit Campag in a XXL, for me tops are harder to find, but I've got a couple. Has anyone mentioned Lusso?
If you live near a
Decathlon store they do have quite good jersey sizes, so that may be an option as well. Some of the team kit is available in big sizes, I got some Bouygues Telecom shorts a couple of years ago and they were massive, so big that I've never really used them.