I sourced one made in Germany through a RV parts dealer in France.
The plywood top in these photos was just to test the functionality. The horizontal movement lock works against the bottom of your table top.
Sliding to the side:
Rotates about 35 degrees to either side:
Here's the website.
They will give you a quote for freight before ordering. Surprisingly,
my freight was only 38 Euros. They shipped with TNT Freight, which is owned by FedEx. It only took about 3 weeks to arrive.
I would make one recommendation if you get this unit. The lock cable where it comes out of the pedestal has a strap to position it. Remove the strap and let it come out perpendicular from the base. Re-position the strap on your table top. The cable works better if it has 'gentle' curves. the factory retainer is very close to the end of the cable and I believe it puts strain on the cable.