Thanks a bunch for all the answers so far. I could pull the drivers out of my current Tannoy speakers and take measurements of internal dimensions. Clone The crossovers and get the speaker model number. I have already talked to by old boss and he's going to call Tannoy on Monday or Tuesday. Hopefully come up with some good results.
On a side note, MTG20, what do you use for measuring? I was thinking of getting a measuring system, but don't know what to get. I have used SysTune before but that is way out of my price range. I just want something to toy around with.