Congratulations for going 20 years without having this happen.
I made my own stuck case remover. You need a tap (I use 1/4-28), a drill (#3) in the correct size for the tap, a plain old bolt (about 1-3/4" long), 1/2" drive socket ( I use 19/32), and a fender washer.
Remove the die from the press, drill a hole through the primer pocket, tap the hole, cover with the socket and washer, insert the bolt and screw it in until the case pops loose. It is helpful to put the die in a vise to do this.
Or buy the RCBS stuck case remover.