I think you're looking for a "Sawiko Wheely ramp aid" I believe they do them with either a manual or a power winch, i spoke to a German guy whilst in Spain earlier this year and watched him load his BMW with a manual winch onto a transverse trailer and it went up really easy, a one man operation.
I would contact the following company to find out prices and purchasing options.
AL-KO KOBER LTD
South Warwickshire Business Park
I may struggle to photograph it in the garage but you may be much more clever at that sort of stuf than I.
Just a typical reply from a lot of members on here now unfortunately! Nothing constructive to say so I will try to be clever and take the piss
by the way do you have a Motorhome these days
As mentioned on another thread, I have a Sawiko ramp, tracking system and motorised winch on order from Germany.
Been on order for 5 weeks now.....lead time is 6 to 8 weeks.
The system is being fitted under a false floor to my Ducato XLWB van during conversion to a camper, to carry our Triumph Bonneville
Happy to post pics once the build starts, if of interest of course?