I've had good luck with Cabela's. I have nothing to do with them, but have found they have good sizing for larger people.

They actually have a lot of jackets suitable for cycling on sale right now.

Here's a couple of examples:
Cabela's Rock Falls Jacket – Tall : Cabela's
Cabela's Tech Trail Fleece Jacket – Tall : Cabela's
Cabela's Breezy Point WindStopper® Jacket – Tall : Cabela's