Stop-ship released 3/27, they are available now. On catalog as a 2014 (should be updated to include 2015 soon), however the same P/N's (PTR29-00140 Main Assy and PTR29-34140 Fit Kit) are used for 2015 as well, so your dealer will order it and install it.
**As your ECU is one below (which it should be - Non flex fuel only), then there is a calibration code available for both 2014/2015 available now. Mine is going in next week
014/2015 TOYOTA TUNDRA 3UR-FE 5.7L
SUPERCHARGER CALIBRATION CODES
ISSUE : B 02/02/2015
2WD NO TOW PACKAGE:
Current ECU ID
30CL0000
30CL0100
30CL0200
3YWF7800
SUPERCHARGER CALIBRATION CODE: 3YWF9200
2WD WITH TOW PACKAGE:
Current ECU ID
30CL1000
30CL1100
30CL1200
3YWF7900
SUPERCHARGER CALIBRATION CODE: 3YWF9300
4WD NO TOW PACKAGE:
Current ECU ID
30CL0001
30CL0101
30CL0201
3YWF7801
SUPERCHARGER CALIBRATION CODE: 3YWF9201
4WD WITH TOW PACKAGE:
Current ECU ID
30CL1001
30CL1101
30CL1201
3YWF7901
SUPERCHARGER CALIBRATION CODE: 3YWF9301