[quote name='Hostile']When the vacuum cut the wire in half, it also sucked in the plug that goes into the Wii. O_O[/QUOTE]
Couldn't you open up the vaccuum canister or bag and try to retrieve the connector? The connector itself may not be damaged, and in that case it would be an easy fix.
If you can't do that then just wire a battery to the remaining cable. Or if you want to make your own it's simple enough. As said here previously, all it is is a couple of infrared LED's.
And if you get a wireless bar, then do think about investing in some rechargeable batteries, preferable lithium-ion.