I received a telephone message today from a gentleman in Oklahoma, asking for this info. He said that he had read my post re the .450 #2 NE that I had built on a BRNO ZP-49 action and was interested in purchasing ribs from Tom in order to do a similar job. Unfortunately, the caller forgot to leave any contact info. Here is the info that you were seeking sir:

Tom Ondrus, C/O Crown Press,
P.O. Box 126, Austinburg, Ohio, 44010,
Phone: 440-275-1400
Fax: 440-275-1511
e-mail: crownpress@alltel.net.

If you decide to do this project, please read the info that I posted on the thread re my .303 Double concerning increasing the height of these ribs by welding on a piece of 1/4" x 1/2" cold-rolled to the front sight ramp and to the quarter rib.

Good luck