Thank you, steve.
Well, the ramps were actually built by my father, having in mind the Zoomed dock that I gave him for reference. Bobo had started to chew on that dock with a vengeance a few years ago, so I just couldn't use it anymore. She had it for almost a year and then suddenly she decided it's so tasty that she just had to tear big pieces out of it and simply eat them.
So my father took some light coloured plastic boards, used a torch (I think) to bend them to the right angle, cut the sides of a black plastic storage box to fit the boards (in order to give
some traction when going up, of course) and then connected them with little pieces of steel, I believe you can see them better in the last two pics. I only saw the finished product, so I have no pics during the building process... He initially made the little dock, and when Bobo grew larger, he made the one that she currently uses in order to climb. The smaller dock is now her bed/resting area
.