Even if this gun was still made, all parts are hand fitted and you probably could not order them.
Send your gun to a good gunsmith like Gunter Pfrommer, NEGC or many others - and they will make the parts for you. They specialize in custom built sidelock and boxlock with nearly every option available. acronym has been used to describe the quality of those Sloans imports.
Athletic Passions gives people who are part of the Athletic community a place to find one another. There is a lot to do and we're positive that you'll enjoy your stay. There is a new level of interaction between our members by starting a journal or discussing topics in our forums. I've seen the ridicule this gun has taken but my uncle loves it and wants it fixed. Seems to be missing a spring and another piece of metal that sits inside under the pin reset. Spanish gun makers were famous for changing names about as often as you and I change socks. Or you can try to find a gunsmith or a machinest who can copy the other left hand trigger parts in reverse. There was a thread in SGW some time back that indicates the gun was possibly made around the '70s, as per here ... f=126&t=168198 There seems to have been as many Arizaga families in Spain as there are Rizzinis in Italy. I looked in five reference books dating back to 1865 and could find no reference for a HIJOS DEf. Judging form the name it's like you say and was made in Spain I'm guessing it was made some time between 19. You can watch the various gun auction sites like Gun Broker or E-Bay and see if one of the same name comes up for auction or for parts but don't hold out much hope.