Does anyone have Action slide tube single bar 12ga for Western field M 550 A shot gun?

It seems you're looking for an Action slide tube single bar for a 12-gauge Western Field M550A shotgun. These parts can be somewhat difficult to find due to the specific nature of older models. I recommend checking online marketplaces, firearm forums, or contacting local gunsmiths who may have access to spare parts or can direct you to someone who does.