I looked at the link, it did work for me but I have a feeling those knobs are not the original ones, they look like aftermarket generic knobs and I think AES might carry them. I have a pretty good collection of knobs so if the correct ones are important, you may find a pic by googling and looking at ebay for similar radios and contact me. I would want to charge something reasonable to cover the time taken to find, and ship them though, so if you are happy with the AES ones that might be your cheapest route.
had a look at the AES Site, it appears they don’t have wooden knobs anymore.
I think I know who was supplying them though, they could still be available, I’ll check and put the two of you in contact if interested.