A Fender pickguard will fit (most all) Squiers. In the worst case, the pickguard holes won't line up perfectly: Just replace the guard, put it in place. Holes that don't line up will have to be re-drilled in the guitar body (be careful not to drill huge holes!). The neck cutout might not fit snug: use sandpaper, or even a sharp knife to gently shave the pickguard material until you get a good fit.
I usually make mine from scratch, but this requires a few tools.
Most likely, the new guard will fit just fine. Don't pay an arm and a leg for a Tele pickguard... there are plenty of inexpensive good ones on the net. My favorite: http://www.grizzly.com/products/Pick-Gu … ngle/H6008
They have others under "Luthiers Supplies". Have fun!