I use different vacuum cleaners and older used parts together with festool machinery in my shop. So I did need to print matching adapter parts for them. I uploaded the files f3d & step so you can modify it to your needs.

Here I designed the male part, fitting to the festool mounts.

Note 1: I printed the parts with medium flex filament.

Have fun and keep printin!

Update 17.05.2023: Redesigned the adapter so the inner part will connect to festool machines too.