Motorhome A Frame tow bars

Hi, we have a Compass Avantguard 130 Motorhome, we are looking to tow a Citroen C1. Can anyone advise on where we can get an `A' frame and relevent electrics fitted. We already have a tow bar fitted to the motorhome with electrics. I have heard of a company in Grimsby, but, would prefer somewhere a little closer to home ( Mansfield Woodhouse Notts).Any advise would be appreciated.