Possiblilty of a micro drive for psp?

[PSPdemon]

I have looked at the 4GB hard-drive for the psp and was just wondering if there was any way to buy one of those connectors.... if possible what i would like to do is to hook up a USB micro drive buy cutting off the connector and putting on the Pro duo Connector on it. i already got a micro drive and dont want to pay $200 to get the 4GB.

Thanks for your time.

P.S. sorry if this was a nooby question..just dont want to pop another 200 for somthing that i can make.