Anybody know if there's such thing as an add-on trip odometer?

Been lookin around and haven't found much. just ones that come with speedos.

I'm considering possible alternatives to switching to the dee-lux guage pod that has the tach. The reliablity and apparently good driving habits of v6 tacoma owners are making one kind of difficult to find used....

The perfect find: Tach/trip odo combo with blue LED or vacuum fluorescent readout to mach my Eclipse head unit....that'd be sweeeeeeet.....