I don't know of any personally that I'd feel comfortable recommending (I'll ask my EE buddy when he gets home, we've got them lying around)

You're still going to pay for an interface. Are you concerned more about size or price? You can get a USB interface for a few hundred bucks. Look up Velleman, AEMC.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth