I may be missing something (and looking at the time, I probably am...
) but if you are looking to use a generic microUSB cable with your existing TS and AC adapter (ie: if you lost the cable that came with the Pre, like me) all you need is a generic cable (monoprice) and file down the microUSB plug until it fits in the microUSB slot in the back of the TS.
I've done it and it works great.