Holley Throttle Plate

Hello, i have a Holley 4160 4 bbl carb. Its missing a throttle plate. I called Holley and they told me its an obsolete part. So i was wondering if anyone had a throttle plate? the list on it is 6231. It came off of a 440 Motor home. the part number they gave me was 9R213. And the other plate say 213 on it...THANKS!