You all do of course remember that the entire point to perking planes is to keep them rare and only so a handful of pilots would fly them at any one time?
You don't have to be some kind of super uber pilot, I got something like 700perk points in the 190A5-- if you got problems getting perk points to get a plane, it's time to crawl out of those overly used ones that you are flying and get into something that will benefit you with a good number of perk points.
Step out of the D9, La7, N1K2, SpitIX, F4U-1D, P51D and get into a plane with something higher than an ENY of 18...
Hell, the La5FN has an ENY of 30- it's just a slower La7, but it will dominate over just about every plane in the arena. THe ones it can't turn with, it can run from.
Explore the other crates for more than 3 flights before you give up and go back to the overly used and least valuable planes.
I've already gotten back 100 perk points in 2 weeks (a total of roughly 10 hours of flying) by using high ENY value planes.
-SW