Hey man... I posted on your thread on the BIS forums as well..
I'm way better at modelling than texturing.. but I've definately helped texture our addons.. and have all the programs.. etc..
I looked around the net a little earlier actually and was only able to find a few pics, but got a couple good ones from the inside of what looks like the same model truck as you have...
I don't think there would be too much work to do just the interior since so much has been done already.
If you want me to give it a try I'd be happy to give you some examples and see what comes of it