cost for 89 si engine replacement?

I have just broke the timing belt and the pistons are gone....how much can I expect (with labor estimates or hours of mechanic's work) to pay for a rebuilt replacement? Assuming that there is nothing wrong with the car?

thanks,
Kevin
'89 si

i have no idea but im in the middle of getting an 89 lude si that has some major body damage in the front drivers side quarter panel in front of the tire and the trunk has to be replaced..the engine has 115k miles on it and my idea for the car so far is to rig it back to shape and use it as a play car..im thinking about selling it..im not shure.