I'm hoping to build my first cnc machine, and I'm seeking advice/guidance for a tool for the following job.

Workpieces 250mm long x 15mm wide x 40mm deep, probably pear wood blocks.

Problem: - to cut a profile around the top face of the block approximately 2mm deep, (width of cut varies from 0 to 6mm) then slice the top 1mm off with minimum wastage, ie 1mm saw kerf would leave the block flat for the next profile cut (this might be a different profile).
This taking two passes of the gantry at appropriate feed rates and spindle speeds.

I should like to have both tools mounted on a single spindle to keep the overall size of the machine down, but if advised otherwise would have to use two routers.
I am thinking in terms of an arbor carrying a 10mm diam cutter with a 1mm deep grooving cutter 30mm diam mounted above it.

I can find the arbor/groover, but can't find a 10mm cutter that would mount on an arbor below it.
Any help appreciated.