Two years ago I purchased a Coleman Powermate 250 psi compressor. It has been more than adequate at maintaining tire pressure for our TM and TV. The compressor is still available. Here is a link to one supplier:
http://sector29.com/PRODUCT_PAGES/18...9-PMC7060.html
The battery for our TM is located in the rear storage compartment. I found that the 12 volt Coleman Powermate would not easily reach the TM tires (from my TV). To alleviate that problem I purchased a volt adapter from Radio Shack:
http://www.radioshack.com/product/in...tId=2103589&cp
The adapter allows me to connect to the TM battery and easily reach the TM tires.