wot - no replies??......
I've therefore gone for simplicity and fitted a pair of 4XRAC brackets from Hi-Lift to the roof rails fore & aft, using exhaust U bolts, on the passenger side, and simply dropped the jack onto that; job done, doesn't look quite as butch as hanging it on the rear as per Jeeps & Land Rovers, but a professional finish results.
No more supermarket car parks for me then!!
....... that'll be the end of this topic then .... still, it may be of use to another "searcher" in the future!!!