Interesting site

[Jaco]

USA site
There are downloadable plans

https://www.scrollsawvillage.com

 

[splinter_smith]

Here's a similar one I have saved in my bookmarks yet to fully look into.

https://www.finescrollsaw.com

 

[scrimper]

My website has free plans to download- they are old fretwork plans from the original (pre 1968) Honnies company and the old (pre 1930's) Handicraft company. I am adding more as time allows.
https://sites.google.com/view/scrimpers-fretworking-site/home