I caught small this lot of TV knobs on eBay (not my ad), but maybe somebody needs a blond CTC-4 channel knob? It looks like there are also a few Predicta channel knobs... That blond channel knob is probably pretty hard to come by.

http://cgi.ebay.com/TUNING-KNOBS-for-VINTAGE-TELEVISIONS-ASSORTMENT-of-14_W0QQitemZ290155503137QQihZ019QQcategoryZ3638QQs sPageNameZWDVWQQrdZ1QQcmdZViewItem

Charles

ctc-10 color knob: http://cgi.ebay.com/Large-Group-of-Vintage-TV-Knobs-Lot1F_W0QQitemZ110169752666QQihZ001QQcategoryZ7337 4QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I wish these guys selling knobs would lay out all the knobs instead of heaping them on each other so you could better see what's there. Same guy also has some Zenith knobs (for 60s b/w and some 60s color sets) in his other ads.