MrNoodles is the part number expert.
However, I think you can only get the T-Lever as part of a set. There are actually at least two different sets that include this part:
412221 - T-TYPE PITCH LEVER SET
412220 - HPM PUSH-PULL SET SD
Both are about $16. Which one you get depends on what spare parts you want in addition to the T-lever. The pitch lever set includes the link rods and ends, plus spare bearings. The Push-pull set includes a bunch of link balls and all of the push-pull control pieces. Nice to have in case the next crash kills the cyclic roll lever or one of the x-levers.