I was wondering if anybody made an internal geared (either 2 speed kickback or 3 speed) hub wide enough to use with a fatty rim.
A coaster brake would be preferred if possible...
Yeah, like KF said, Sturmey-Archer makes'm; never seen one in coaster flavour, but they make a band brake version (SX-RB3) and a disc brake version (SX-RK3). These are 163mm and 170mm OLD, respectively.