Build one. Use inexpensive wood for the case, use melamine for the top and check it for flat with a straight edge before you buy it. Go to HD and borrow a good straight edge and walk it over to the melamine area. I like Baltic Birch for the top, but you can get a piece large enough for a bottom layer for the top for maybe $25$. That second flat layer just helps keep the top flat, and gives you a little extra depth for the rabbit to hold the mounting plate without sagging.
Just buy the Bosch router with the fixed base, or in the EVSPK kit. You will need that and a pattern bit with the bearing on the shaft end, not the tip. You can use a piece of wood clamped to the top as a guide for the rabbit that will be slightly deeper than the thickness of the mounting plate.
The paralysis thing will really mess a guy up. Know what happens if you screw it up? Nothing much. At worst you learn a lesson and start over. More likely, if you watch a lot of videos first, it will turn out OK. As the musician said, "don't let the sound of your own wheels drive you crazy."
I'm making my first frame for my wife's painting and doing my very first fine finishing project. I've followed my own advice, and read a lot and watched many videos, so it was time to start. Oddly enough, many of my not-quite-clear questions were answered by reading the labels on the cans. Oh rats, read the instructions (although the subminiature type on the can is really hard to read except in bright sunshine).
You will find that just jumping in will get you far along pretty fast.
The more I do, the less I accomplish.