You could try making a natural extract with your dried peppers. Take thoroughly dried peppers of your choice, crush into flakes (I would remove the seeds and inner membrane personally) and cover with a little PG, just enough to cover the flakes and smidge extra. Heat cycle a couple of times (place glass jars into a pan or pot of very hot water), and "cold macerate" for a month or two. Strain your mixture when it is ready and filter through paper coffee filters or cheese cloth or other fabric, and then through cotton balls in syringes. Place filtered mixture back into a clean jar and let it sit for another week. Then take a syringe and decant above any sediment that is left in the bottom and any oils that may have floated to the top (remove the clean liquid from the middle). What you're left with will be your flavoring concentrate and depending on how strong, you'd need to use it anywhere from 10-25% in your recipe.
Caveats: Peppers contain some sugars and your extract is likely to pull some of these out, so it could be a coil clogger. Secondly, it is going to pull the capsaicin out (which of course you want, it makes the pepper spicy), but I would be concerned if capsaicin is really safe to inhale. Aresolized capsacin is essentially pepper spray, no? I would have the same concern about the artificial pepper flavors on the market that likely also contain capsaicin. Regardless, please proceed carefully!
Personally I have Schezwan pepper corn extract in my vape panty that I haven't been brave enough to try yet. I might just not! (but curiosity will probably get the better of me at some point)