I have this trailer, Stema Carrier XL, with 3 ramps, which fit under the platform, german quality :):

https://www.stema.de/stema_plattform-hochlader_de.html

4 aircooled cylinders, 7 tires, not waterproof: my m3w Bluebelle (2013) and my 2CV Gundel (1990)