Hi Lisa, sorry for the slow response, busy time of year.

This pantry drawer is a Blum Tandembox Plus inner drawers, these were made obsolete about 3 years ago.
A similar version available now is the Blum Tandembox Antaro inner drawers. The hardware for these (metal sides, runners and inner front components) are available to the public (and trade) in Australia through 2 suppliers only; Lincoln Sentry (Victorian sales and showroom in Bayswater) or Wilson and Bradley (Victorian sales and showroom in Preston).
These drawers also need a melamine base and back to be cut which makes up the rest of the drawer.

Hope this helps, regards, Jasmine