I am looking for a speaker and knobs for a Walton radio. I think it is a 7 tube radio. Any help would be appreciated.

Knobs (both originals and resin reproductions) seem to come up on eBay frequently, although the prices seem somewhat high.

http://www.ebay.com/itm/Antique-1937-Zenith-Shutter-Dial-Radio-For-Parts-or-Repair/321357050012