Here is an old Eelco cast aluminum gauge panel, Model 400, designed to house one standard 3-3/8" tach or speedo & two standard 2-1/16" gauges. The panel measures 9-1/4" X 4-1/8" at the widest points. It does not have any mounting holes & is in good shape. Someone did some engine turning to it at one time. Although it appears to be an amateur job, it does give it an interesting period flavor. H.A.M.B. priced at $47. The price is plus shipping...let's say $8 to the lower 48. PayPal would be best, but a Postal Money Order would work, as well. The first P.M. committing to buy gets it.