I would suggest going over to the FOG Festool site and do a search. There is a lengthy discussion on how to do it your self with CNC accuracy. Peter Parniff from the UK along with Axminster Tools offer a set up that has gotten great reviews.
I went the CNC route and had a fellow I knew make my top. It took a few times for him to get it to my specs. A lot of time and money. If you go the CNC route find a reputable person and find out who pays for the mistakes. Also there will most likely be a setup and a charge for doing the programming. Some things you may have not thought of
take care