Tran pan bolts stripped

No leaks dripping on the driveway but I can see some oil streaks on the pan. The pan hasn't been touched for a year and a half when I changed the filter and gasket. I did have it flushed last month but only the cooling lines were touched.
I went to retorque the bolts and have found 3 that are stripped. The bolts have a little tension but then give way. Anybody know of any quick fixes or some hints on rethreading. I think the threaded holes are through holes and maybe I can use a nut and bolt system until I change the gasket again in the spring.

John