Yes, I texted Daniel aka RuhrTrooperCosplay yestderday and he got his files from a different source for more money.
I also talked to FialaFernbrugg about it last night and he said that those files can hardly be scaled down for action figures because they usually break. That's why he designed his files from scratch.
A lot of work and effort goes into projects like these. And even if I don't get this pack of files, the video is an inspiration for custom blasters in 1/18 and 1/12 scale. There are so many blasters that I hadn't known before.
Thanks for your comment, Starchaser!