[Arran]

I think that $32 is probably about right given the situation with the dial and knobs. You can also find used original knobs on a certain auction site, or post an ad in the wanted section for them. Radio Daze also sell repro Hex knobs as does Larry Bordonaro here:

http://www.antiqueradioknobs.com/partlistings.html

I purchased a set of hex knobs from him about five years ago, the only drawback is that most reproduction Philco hex knobs have set screws for some reason even though many of the other repro knobs do not and the originals did not.
Regards
Arran