I'm trying to find some large aluminum knobs..the Kilo ones sold at digikey are nice, but only come at a max 0.925" diameter. I'm trying to find some big ones with a diameter of more like 1.5-2"...know a good place to look?
Check out DACT (Danish Audio Connect). They make gorgeous stainless steel knobs in the following sizes: 1.0", 1.25", 1.50" and 2.0". The main site for DACT is at http://www.dact.com. The US Distributor is Aloha Audio, at http://www.aloha-audio.com. Last time I checked, Hiroshi at Aloha had some knobs with special finishes, too. But just be warned--the larger knobs are *heavy*, and this line is made to fit 6mm shafts, so the holes will be a little bit too small for standard 1/4" pots. Some of the better attenuators, such as those from DACT, come in the 6mm size.
Too bad you don't live in Singapore and it's not worth shipping to send you a knob.
I've found really big (1.5" - 2") & nice knobs over here. I currently have one black plastic knob that has a hole for LED to shine through! (Think of the OBH-11SE knob but with a hole for LED)
Also found various aluminium and gold plated knobs from the same shop.
The best shop for large knobs is THL Audio in Taiwan. At the THL site, go to the Plug/Socket/ Accessories Section. There's a nice selection there. Actually, it is the best selection of knobs I know of. Take a look...