Are you on hormone therapy?
If so, that should stop it spreading for the time being.
If not, you might ask if you can go on 150mg daily Bicalutamide until after the operation.
Might be worth getting another PSA test done just before you start HT, to make sure it hasn't got significantly worse. (Not much point after starting HT, as that will bring it down anyway.)
HT has side effects, but not serious if just for a few months, although you might want to ask for Tomoxifen too, to prevent breast growth, or at least, be ready to get quickly it at the first signs.