[sdiy] Rotary Switch Needed

[BrightBoy]

Hey Gang!

I was wondering if anyone can recommend a good source of heavy duty
DPDT (ON-ON) rotary switches????

I want to be able to configure a 2x10" guitar speaker cabinet so that the 
8 ohm speakers are either in series (16 ohms) or parallel (4 ohms).  This 
will allow me more flexibility between a few of my different tube amplifiers.
The total wattage capacity of the cabinet will be somewhere between
100 and 200 watts (if haven't picked the specific speakers yet)

Of course, a source in the USA (surplus or new) is perferred.

Cheers,

Jeff