I've been doing some work at my inlaws wooden country house recently and had the need to mount my router in a table setup.
The place has been slowly undergoing renovation for the past year and there is a lot of junk around.
Low and behold I found a piece of 10mm phenolic about 70cmx70cm. It has a lot of holes in it but that doesn't matter. Nobody knows where it came from, and I've never seen it for sale anywhere here yet. I found out they still call it Bakelite, well actually in Croatian, Bakelit.
I also then found this great aluminium extrusion that has t slots on both sides, as well as both edges, plus at the end there is a nifty little locking device that looks as though it would lock into the t slot of another piece (if I had one)
It is perfect for making something like the Trend Vari jig Trend 'Vari Jig' Adjustable Frame - Machine Mart
So, I mounted my router direct to the phenolic, clamp the phenolic to 2 drawers and then clamped the extrusion to the phenolic, and had myself a router table.