Yeah, automatic tranny. I got mine at Tim's Toyota in Prescott AZ (they're the authorized Isuzu place and they used to have a dealership).
1-800-339-8467....and ask for "Isuzu parts".
I ordered at parts window, they called when it was in.

If you need me to order it, pick it up and mail it to you just shout. No prob at all, I've got the time and it's really close by.