I still have the following OVMS hardware available for free in the UK (subject to ZCW donation) thanks in part to Paul Churchley who kindly donated two OVMS kits to ZCW;

1 x Tesla Roadster Kit;

https://speakev.com/threads/open-vehicles-tesla-roadster-hardware.6050/

1 x Leaf Kit (could be used with Ampera/Volt if you don’t mind the OSBII cable pointing the ‘wrong’ way);