The datafiles for Farbrausch's acclaimed Debris demoscene demo have been CC-BY 3.0 for a while now, including the V2M for Ronny Pries' soundtrack, which is not musically really suitable for STK in its original form.
Accordingly I have, starting with a render of that V2M, isolated portions which might make a good STK soundtrack and fairly seamlessly joined them in a loop. The resulting OGG is attached.
I personally find it a best matches the 0.8.1 addon "Lost Speedway" ... but I'm just throwing it out there and seeing if it's helpful now or in the future.