On my mill/drill, I got a manual Enco pump on sale some time back for about $40. Made a log type manifold to screw into the outlet port (should have put a check valve at this point, but didn't) and then using 5/32 tubing and push on connectors (MSC), ran the tubing to various points for oiling. In some cases, I made adapters to fit existing "oiler" spots by tapping them and inserting tapped bushings for the fittings that I had. In an attempt to restrict the oil flow, in some cases these bushings had the last bit drilled with small drills ~#60 to act as an orifice. In other cases, I drilled and tapped the saddle or table in central locations to provide the necessary feed points and again, the last bit of the hole might contain a restricting orifice portion.
You can see some of the setup on my webpage at:
http://bellsouthpwp.net/A/r/Arts_home_page/cnc/
When rebuilding, I was also fortunate enough to have access to a rebuilding book from a friend that recommended putting "Z" grouves on the ways to help distribute the oil (one can be seen in the X axis picture on the web site). These were made with a die grinder and friction wheel freehand. Burrs were removed and it work very well.
Bubba
Art
AKA Country Bubba (Older Than Dirt)