Yes, but it likely won't be cheap (speakers don't run cheap in the open market, at least in my experience).
For a 4x10 4 Ohm cab, you will need a quantity of 4 16Ohm speakers (wired in parallel)
Or, you will need a quantity of 4 4Ohm speakers (wired in series-parallel).
If you don't know what that means, see this site:
http://www.colomar.com/Shavano/4x12wiring.html
Unless you can find a good deal on speakers, it's likely cheaper just to buy a 4 Ohm cabinet (I'm guessing the two cabs you have were 8 Ohms, so you're probably not going to be able to wire the speakers you have to get a 4 Ohm cab).