Contacted my local (Swedish) Toyota dealer for the 55417-13010-B0. Took two days for it to arrive and had to pay ~35 euro. Those white clips mentioned earlier were included.
I mounted the Hilux FP-11-05 directly to the 55417-13010-B0 by drilling small holes and used steel wire + tiny screws to hold them together. The "ear" pieces for connecting the Hilux too the car wouldn't work, but still feels pretty solid.
*Update*
Upgraded the cheap china stereo to a double din Pioneer unit. Now connected to the car with the same pieces used by the original radio, so now things are not hanging from the front piece . Fill-ins I got of eBay