I did try to use the Search function and a manual 'browse' technique, but no luck. I kinda rotate around different A/C eras. Am on the WWII kick again. For some reason my WWII is doing this rather annoyingly. If I delete out the stock planes which are mostly jets. Every time I then start a Single Mission Aircraft folder has the stock planes back.
You know what as I was typing the above, it dawned on me to check the OPTION.INI file for dates beyond WWII and I did. Will return later with a result. Oh, I have all the games and stock expansion packs. Don't have all the DLC. Anyway, yu can imagine how many planes I have to scroll thru.