I use the walker's game ear quad muffs. Each muff has 2 microphones (fore & aft on each ear.
I bought mine off Ebay nib for about 60 plus 10 to ship. They were much cheaper than the Peltors. I just checked ebay and there is a set identical to mine on a buy now for 90 plus 10 to ship AND I just noticed they have "make offer" set up so they can probably be bought for less.
I just checked on Peltor Comtac II that someone suggested and they are going for way over $300. I also checked on the Radians and if you don't mind PINK, you can get a set for $65
Hey Peet......... are your radians PINK????????