Hello Maureen and Stephen,
Hope this is of some help albeit expensive.
Towbar with extension kit for Renault based Motorhome 2002 onwards
Although of no interest to you, but may be of interest to other members, we actually used this type approved model from the same manufacturer and because it is width adjustable, it does fit any Al-ko type chassis.
We paid £470.00 delivered from a supplier in this country. It was easy to fit taking about 2 hours.
Incidentally, type approval for towbars intended for motorhomes applies only to motorhomes built after April 2012. Motorhomes built before this date do not require a type approved towbar. I have a non type approved towbar which was fitted to a 2006 vehicle and I transferred it to a 2012 vehicle. It was only after a few months I became aware of the new rules and had to purchase the type approved towbar as mentioned above.
The non type approved towbar is now surplus to requirements and is for sale at £50 collection only.
Last time I spoke to Rick Faulkner who also possesses a Renault based Hobby, he did express an interest in purchasing a towbar. Hopefully, Rick may come along soon with his findings, and / or some advice.