Bathroom light diffuser

[sarasafari]

I have a '69 safari with slanted rectangular light diffusers. The knobs don't match, and I want to replace the discolored diffusers (one is broken, anyway). Does anyone know where to get these knobs? Also, I was thinking of replacing he diffusers with "floating" cut frosted glass panes because I haven't been able to locate the unusual '69 shape plastic ones.
Sara

[Ganglin]

If it's this style knob - try Lowes or HD and look at replacement dimmer switch knobs to see if you find something that suits you and will fit. The panels you may also be able to replace with lexan - it comes in multiple shades if you have a local supplier. Or, purchase the clear from a big box store and sand what will be the back side with and orbital palm sander until you get the effect you like.....

[sarasafari]

Gary, thanks so much for your reply. I thought about the dimmer switches after I posted this thread--glad to know I was heading in the right direction. I'll check on lexan and see what I find.
Sara