Pretty much any brand RODI system can be hooked up to your tap without having to cut into pipes. All you need is the adapter.
http://www.buckeyefieldsupply.com/sh...ry=187&Sub=133
Scroll down a bit & there are all kinds of flavours of adapters. You might be able to find something like them locally, but it usually takes some searching in a specialty hardware or plumbing shop!