Here is a good collection of CNC single stoke fonts.

http://www.mrrace.com/CamBam_Fonts/

CamBam Stick Fonts download fails.
Possible Alternatives:
Free Version:..... https://ncplot.com/stickfont/stickfont.htm
Paid Version:..... https://ncplot.com/stickfontv2/stickfontv2.htm

Thanks for your links. I used this fonts. And I found a interresting font: it is a normal version and a mirrored version.

https://www.wfonts.com/font/cnc-vector-mirror

Meanwhile my CNC-freak told me that he may handle normal fonts into a mirrored version...hope this is not a misunderstanding....