There's a number of replacement parts I wonder why Vic doesn't make.
108mm Saw Covers. Sure the 108mm line was retired in 2003, but people are still losing the saw covers. I was lucky that a member here had one when I got a GAK that was missing that part. I don't even carry my GAK that much because of that, and when I do, I typically leave the saw cover at home.
Scissor springs, both single leaf and bent for older knives. They're available in the scissor repair kit, but not individually.
Metal headed tweezers, because on older knives, plastic headed ones just don't look as good, and finding original ones intact with their scale tools isn't easy.
Short Tweezers, typically used on models with the LCD.
Wenger Toothpick and Tweezers, and scales. When the Delemonts came out after Vic phased out Wenger, they went to Vic scale tools. They're still pretty easy to find, but the stock is going to dry up.
And finally, more widespread availability of parts like scales, instead of only making them available to authorized dealers. They should be available everywhere Vics are sold.