An oil pedestil adapter for use with oil pressure and temperature gauges, follow the link : http://www.mazdatrix.com/b7.htm
For a third gen though , its not a direct fit , it will bolt up to the block , but the banlo bolt on the oil line wouldn't line up correctly , it would have to be modified .
I think I'll just put a foot or two of SS braided hose at the end of the oil pipe with the appropriate fittings.

 

You know that the Greddy oil temp gauge comes with an adapter similar to this. I image all you'd need if you also want a pressure gauge is to drill and tap into that same adapter. Hell, it might even already have a hole for it, I dont remember. Its a pretty nice piece and doesnt move the filter up near that high. The Greddy adapter is only about an inch or so tall (from my memory...which is sometimes bad haha)

Stephen