oil pressure guage suggestions, ideas

Been thinking of adding an oil pressure guage to my 67 Dart(mostly all stock)but I dislike the look of a single add on guage under the dash, and I guess I am some what of a purist so cutting the dash for one is out of the question. Any suggestions for an oil pressure gauge?
Thanks
Mount it in the ashtray area and close the ashtray door when at shows.