1998 Ford Escort I messed up while Replacing Thermostat

Ok I went to replace my thermostat, it is probably a simple process. Everything was going good until I went to remove the three bolts that hold on the thermostat housing. And my lucky the first bolt was so rusty that it broke off, the other two came out fine. So I didn't know what else to do, so I drilled out the screw and when the Thermostat housing came off, then there wasn't enough of the screw to grip and screw out. So I continued to drill the screw out and I was at a bad angle and I drilled too much to the right of the actually hole. So now the T. Housing won't line up, of course. So I don't know what to do now. Do I have to buy another engine now. Or is there so way I could drill the right hole out and somehow plug the wrong hole?

Thanks in advance