There is an relatively easy solution, and it generally works with most double guns. Lock it away in you Double Gun Memory and you may get someone in distress to buy a drink... Take the barrels off the action(not called a receiver), push the extractors all the way out, take the forend and put it in place on the barrels and latch it. Now take a piece of wood, or even the brass of a shell and one at a time push the extractors back into their recess in the barrels. This should recock the ejector tumblers. You should be able to take the forend off and re-assemble the gun. This can happen on a lot of guns, and some even let the ejector tumblers fire with the barrels off the gun.
