I have just started building a Arduino based 3 axis mini CNC device called the piccolo (You are not allowed to view links.
Register or
Login) that sounds similar to what you are doing...
You may want to check it out.....
They don't have kit but have released all the information and artwork files to make your own. Someone in our local maker space put together a group order for the parts while someone else ordered a bunch of the boards. The PCBs took about a month to get but seem to be fine...
I have got the board populated and tested. Just waiting for another member of the group to get the various mechanical parts laser cut (again through the local maker space that has a laser cutter) so we can assemble the rest of the unit...
oops wrong button - met to click on quote but hit modify. My bad.
RR