So here are the plans for the Reversing sensors (actually more interested in having these on the front of the car).
Basically we will need a few things:
1 . Device (Ebay link) Cost: $50 (will need two for the front and the back) :
2a. DIY USB adapters (link) Cost (NA):
2b. Buy premade adapter (link) Cost (60 pounds each would need one for front and rear):
3. Centrafuse plugin (link) Version 3 plugin in Beta:
As you can see above the plug-in supports use of USB cameras, so I may either buy one or re-purpose one.