select the genre on the left

Most sheet music is commercially available:

https://www.all-sheetmusic.com/index.php?cl=search&searchparam=egid+j%C3%B6chl

https://www.blasmusik-shop.de/Suche?q=Egid+J%C3%B6chl&search=

https://www.alle-noten.de/Kuenstler/Egid-Joechl/2/?force_sid=sh0q3o8c3k782jtq94i6m0b6fl

https://www.mayrische.at/index.php?query=egid+j%C3%B6chl

https://www.bandmusicshop.at/search?q=egid+j%C3%B6chl&SubstoreId=

and some other sheet music dealers