400AT Rancher, all 420's, 02-04 450 Foreman's, all 500 Foremans (14+ have diff lock also), 05-Current Rubicons (15-Current have diff lock), all Rincon's both 650 and 680.
So that leaves the:
86-89 350 full time 4x4, no aftermarket unlocker
88-92 300 Fourtrax, wide open kit for 93-00 can be modified to fit with longer shaft. $$
93-00 300 Fourtrax, Wide Open kit available
00-06 350 Rancher, Wide Open kit available
95-03 400 Foreman, no aftermarket unlocker anymore
98-01 450 Foreman, Wide Open kit available
01-04 500 Rubicon, Wide Open kit available
Also worth mentioning that the 2/4wd actuator on the 420's is manual lever operated and not electric, the 2012-2013 Foreman was the same.