a) has anyone found a good website for prices on "authentic toyota HH accessories" that they've used and would recommend to others? Looking for things like the rear cargo mat protector and stuff, but without my local Toyota dealer's pricing.

b) recommendations on using a DC convertor in the rear "accessory jack" for running laptop, blender, stereo, TV, etc for extended periods of tailgating? I don't mind running the power with the engine turned on so as not to kill the 12V and would get some converter with a high amp(?) rating, but looking for recommendations on this as well. Or do I just go with one of those rechargable portable power packs for $100 that you see at SamsCo?

Try Lloyds Mats (look them up on the web), I bought the clear ones and they are nice.