O'Rilleys says they sell it.
2400 Fredericksburg Road
San Antonio, TX
(210) 737-3556
Good luck with it.
Thanks everyone. All the auto stores here were a no go on the 75w-140 so I went with the 75-90.
M1 VT is an engine oil and transmissions need the extra protection of the additive packages that a gear oil gives because of the shear factor of the gears. I wouldn use the M1 VT in a trans.