100% repair vendors for common items and low value items. Things like PA and plasma/lazer weapons, I don't want some wastelander vendor living under a bridge to know the first thing about repairing them let alone fixing it 100%. 100% fixing vendors that can fix PA and Plasma weapons/Lazer weapons. They should be really rare and cost alot of money. Could also have something where you need to find the parts first to fix it. Or they say "sure I can fix it, come back in a month and bring alot of money with you."
In FO1 there is a guy in the BoS base who does their PA maintenance, and you can get a set of PA from him if you can obtain a certain part from the quartermaster to make it operational without tipping said quartermaster off as to why you need the part. Of course, at this stage in your BoS membership you're not really supposed to be able to get PA yet, but characters with a high Speech or Repair skill can pull it off and get a suit 'ahead of time' (you eventually do get one as a reward later on).
Now, FO1 does not have item degradation, but it only takes a couple of minor tweaks to change it from Reward=(item) to Reward=(Repair unlocked) for use in the current setup.
Maybe 100% CND should be made more like a reward and not something to take for granted. Meaning, a fully repaired weapon would be something to strive for instead of CND just being an annoying number that really bears no significant impact as long as you keep it somewhere above 25-30% (like in FO3). Get a 100% repair and you've actually earned something instead of toyed around a bit with convenience. That should, of course, mean no 100% rp NPCs, bigger impact from the CND values, lower degradation rates and balancing the impact, but in the end it would be rewarding but not essential to raise up repair.
In order for CND to stop being an 'annoying number', performance and CND would have to have nothing to do with each other, which would nullify the mechanic in the first place. As long as CND affects performance (and it should) there needs to be a way to counter the wear incurred during combat. Now, I would agree that it should perhaps be a bit more difficult than simply adding two nearly worn-out copies to the one you are wearing to get back to max CND, however I would not necessarily say that 100% CND should be a reward in the traditional sense of 'You accomplished
, now you get ' so much as a reward in the sense the getting either Barter or Repair to 100%, and thus being able to get 100% CND, gives meaning to developing a character along those lines. As a side benefit this would give incentive to raise Barter, which in FO3 is utterly useless, since a high Barter would mitigate repair fees via either increased profits from sales or adjustment of the fees themselves.