Passive bass roll off?

I have a guitar (let's call it a Tele for arguments sake) that only has a volume control. I want to put a tone control in, but I need a way to reduce bass more than treble. I can live witout a treble control on this. How can I create a passive bass roll off? Thanks!

Here you go:

http://www.metalguitarist.org/forum/guitar-tech-electronics-diy/773-tight-control-simple-passive-bass-cut.html

Great, thank you!

Those values can be found on a varitone type tone control which also gives the ability to change the value on the fly

The varitone works in conjunction with an inductor, but achieves a similar effect.

You could omit the inductor and make it a Decade tone control