Important note: you may have to settle for a T5 with an electronic speedo output. Those with mechanical output are getting hard to find and costly. If you do, don't worry. There are ways to overcome this. If you look in the electrical bay section of this forum, you'll see where I (and a couple of other people) have been doing work and explaining how we're doing this. And it is possible to have the electronic speedo look pretty much like the original. So, you do have choices. Good luck no matter which direction you go.
There is a vendor or two on eBay that offer mechanical speedo conversions. Pricey and no idea on the quality but it’s an option. I was lucky enough to find a T5 on kijiji only an hour or so after being posted. I took a risk and the seller held it till a coworker could pick it up. My other option was buying an S10 with an electronic speedo and convert it to mechanical.