I can't remember where I got mine (it might have mlcs woodworking), but here's something similar. I run it in a $30 harbor freight laminate trimming router. works great.
I didn't come up with idea myself...someone posted it here on the forum.

http://grizzly.com/products/Solid-Ca...-4-Shank/C1455

Its a 1/4" flush trim laminate bit. It will follow a 1/4" groove cut by a 1/4 endmill nicely and quickly knock out those tabs. I find laying the piece I'm cutting on a non-skid mat (I use rubberized shelf liner) really helps keep the pieces from shifting until everything is cut out.

John