want to swap single shelf from Selby stackable rack

I have re jigged my rack and need an additional small (not mini) sized shelf
Selby sold these (unbranded) racks as seconds about 12 years ago. Sold in Melbourne only I think.
They are Black only stackable spiked shelves with 3 legs each
There is a photo in "djb's listening room" thread in the show case forum
I have several spare shelves I could swap (bought 2 rack sets)