Finally, we have had good reports about Clearcut Conversions of Barnstaple (www.clearcutconversions.co.uk). They can provide all types of conversions for your Bongo from portable units to full conversions. Contact Richard on 01271-373853.
Another one you could try is Cool Conversions of Newquay.Their units are constructed from top quality “vohringer” furniture board, and contain cooker/sink combination with piezo ignition, automatic tap and water pump, 12 L fresh & waste water canisters, 12v connection. Can be fitted as rear or side unit. Rear unit is bolted on to rails and can face in or out. Passenger side rear split-seat is removed to fit side unit. Dimensions approx 1100mm long x 600mm high x 400mm deep. They cost around £750 fitted. Contact Jack Ryan on 07790-719407, or visit their website at www.coolconversions.co.uk. They also do front L-shaped conversions.