In search for seat release knob!

Help! I been looking for the seat release knob shown in the picture for a Bench-Bucket seat. The knob is chrome with a radius-ed back side that has ribs on the arc part. Has a slot on the top side to attach to the seat. Looked every where and watching on Ebay for quite awhile but no luck, has anybody seen this knob and where?? Any help would be GREATLY APPRECIATED!!! Thank You!