Csakstar

I am looking at doing sockr1's Nexus 7 tablet install (I already have a large majority of the components needed). That being said, I want to be able to utilize my car's built in steering wheel controls with the tablet. I was wondering if someone knew of some options besides the GROM unit (as I've had two defective ones before I started this project, and have no desire to go back) that could let me connect the tablet over Bluetooth and utilize the steering wheel controls. I don't know if it makes a difference but I use Spotify as my music app. Thanks!