You might want to check this site out. www.pocketlogger.com
They have one for obd II's for around $200 bucks. Good luck.
I use his logger for my GVR4 and so far have love his product.
Pretty good customer support too.

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96 Legacy LSi wagon
92 Mitsu Expo
95 525iT
1983 300TD clackclackclack sold
1972 Toyota Corolla wagon TE28 sold
1991 Galant VR4 pshhhhh non-op
1989 Montero RS pop's ride