Hit me up via PM if you need stuff. They are out there from almost any commercial dealership as well which you can find locally.
Typically it will be an RSH4S-XXX where the XXX is the model number of your device.
So a Panasonic VCR (DMR-EZ17K) would be a RSH4S-Panasonic DMR-EZ17K
The price is listed as $140.32 per rack shelf for any custom shelf from 2-5 spaces.
Note the following:
RSH4S = Black Textured Shelf = $140.32
RSH4C = Silver Annodized Shelf = $167.41
RSH4A = Black Annodized Shelf = $167.41
My preference is for the black textured shelf because it doesn't retain fingerprints as easily and it costs just a bit less.