This video shows how I make these trees. I learned and modified my techniques from other youtubers. You can make a hundred or so for the price of buying 5-10 quality trees already made this size. That is what I found to be true. These are big and cover allot of surface area for dense woods. Link below
https://www.walmart.com/ip/Flanders-SM1006-NaturalAire-Hogs-Hair-Cut-To-Fit-Air-Filter/16225736