Hi Mark, welcome to the forum!

Most of the small CNC routers you see advertised on eBay will do what you need but be aware that the quality of them is sometimes shocking. The electrics nearly always need replacing/upgrading and you're best to get the ones with ballscrews rather than trapezoidal leadscrews. What quantity of parts do you do, lots or just small batches? If lots then I'd reconsider using a small 3040 machine and perhaps look at making your own which isn't as daunting as it sounds!