Holy Roller comes in 2.2;
DTH comes in 2.15 and 2.3.
On the Kenda side,
K-Rad comes as a 2.125 and a 2.3;
Kiniption comes in a 2.3.
Actually, quite a decent selection in narrower - - if nothing else, I suppose, for all the 26" guys racing cruiser class BMX.