Where I can find antibody for AAT

[remini2]

   I am a graduate student in Cal Poly Pomona. In my research, I want to
label the enzyme aspartate aminotransferase (AAT) that catalyzes the
production of glutamic acid in rat hippocampus, cerebellum, and retina.
However, my advisor professor and I can't find the antibody for AAT. We
searched Sigma, Fisher Scientific and VWR, but nobody sold AAT antibody. If
you guys know where I can find the antibody, please inform me. Thank you!

Nick