Where can I buy this discontinued Apple product?

I’ve looked all over the web for Apple’s MA473G/A 24”” iMac VESA Mount Adapter Kit. It’s for an older white iMac (from 2006). They make the mount adapter kit for current iMacs, but the mount for my older 2.16Mhz iMac has been discontinued.

Does anyone know a place where I could buy this? I ordered from one online retailer and they later emailed me that they did not have the product. The other I found charged $70 for shipping in addition to its $30 retail price. That’s more than I’m willing to pay.

Thanks for any direction you can give. I’d love to be able to mount this iMac on the wall. I don’t think I can use a standard VESA mount without this adapter.