All good, and I have owned a number of spanish small bores. That being said, parts for many makes are obsolete, especially strikers. Kirk Merrington and I just went through re-creating strikers for a very high grade Zabala, side lock 28 bore, and it finally started scratching the $800 mark to remove, make and replace firing pins.

AYA
 

Several years ago I had a great source for new Grullas. I picked up a 410,28, and 16 all with 29" bbls and straight stocked. . Full round action side locks with Purdey engraving and killer wood. Don't ask me why but I traded them for a CSMC 28 ga Model 21 that weighed a ton and after trying for several seasons I let it go and started looking for a 28 ga Parker which THE Parker Gods found for me!!! I must admit the 16 was my favorite Grulla. One season shot a bunch of Teal with it in early season. Gun People are funny why they get the notion to do certain things!!!