Option 1) Wrench it your self. If you do this you will need to drop the cross-member in order to remove the larger of the two pans. It isn't difficult but it is time consuming and messy. For the smaller sump pan you will need to fill about 2/3 full before re-installing it. That means holding it place with one hand while starting at least two bolts with the other. A second set of hands will help a lot, but if it is just you, you can feed all of the bolts through the gasket before putting it place and they "should" stay in place. It worked for me last weekend anyway. You will also need a fluid pump to put the fluid back in. The pump I had couldn't handle the thicker, heavier additive so I put the additive in the smaller pan before reinstalling it.

Option 2) As we all know Isuzu's are not officially supported in the U.S. anymore. However most Subaru dealerships still work on them and can get parts for them. Of course you are also paying dealership prices for labor. They also have the specialized tools that an Isuzu transmission needs (should you want to change the solonoid) where other shops may have to purchase these tools and are probably passing this cost on to you.

Option 3) Look for a small independent garage that specializes in off-road vehicles. This will be hit and miss. I am not from so-cal, so I have no idea what's your specific area.

Otiom 4) Go to the unemployment office early in the morning and ask if anyone wants to make a hundred bucks for some light mechanical work. Sounds shady, but a some of these people really know what they are doing and could use the money for honest work. It is not uncommon to find someone who knows how to turn a wrench.