Does anyone now where I can get a Firewire cable to USB cable or some sort of adapter that will work for a small external hardrive that is powered by the firewire cable?
There's no such thing as a firewire->USB cable.
There are FireWire to USB adapters.
Please point to one currently available that has Mac drivers.
This is news to me...I've never seen one before, or even heard the possibility mentioned (only the lack thereof)...just googled and came up with this:
http://www.usbfirewire.com/Parts/rr-527950.html
And some other similar ones, but everything seems to say that they're windows-only. I was given to understand that the differences in architecture between buses precluded the possibility, but I guess not. Still, he's out of luck here if he wants to use it with his Mac. Unless yours works, Skil. Does it?
Only camcorders - and not hard drives, especially ones that draw power - tend to use 4-pin ports, so I think the OP may be out of luck there either way.
Yep. I agree with Sun Baked's idea to just get a new enclosure.