I have a Red Label that's 13 years old and has over 30,000 rounds through it. It's one of the heaviest over/unders, but I like that because it smooths out my swing.
Aftermarket chokes for mine are impossible to find, but they changed the style of tube in about '95 - I think the new ones are Briley, but I'm not certain. Since the guns come with 2 Skeet, 1 IC, 1 Mod, & 1 Full, I can't see that you'd need much else in the way of chokes - unless you need an X-Full for turkeys. Just my opinion, but I've seen too many people who are too concerned with what choke they should shoot on a certain presentation, but almost any choke would break the bird if it was in the center of the pattern - It ain't what you shoot, it's how you shoot.
As to the pad, I don't know if Limbsaver has a pre-fit pad, but I know they have grind-to-fit pads, and you could always fit one of those.