Help on making a bootleg PSP headset

[Superstar7]

And please, I saw this already: [Only registered and activated users can see links. ]

Anyway, without shelling the $20 to get the PSP headset, are there any cheaper alternatives that you used? Can you use something like a phone handsfree piece (obviously not a Bluetooth one) to hook it up and use it for online play, like Syphon Filter DM?