Does anybody know if the crossbolt safety on a Belgian Browning A5 can be reversed to make it a left hand safety?

Check with Alhmans in Morristown Minnesota.

Art's Gun Shop is in Hillsboro, Missouri is "the" place for all things concerning older Browning firearms. Especially Auto Five shotguns. They have a website, look them up and give them a call. They can give you the straight scoop on the A5.

You may be able to find a Williams on eBay or auction arms. I have seen them for sale though long out of production.