You can request any song for Riedlerfiziert here. It's completely free!
You can also comission me to make original music, but in that case, please email me at email@example.com and describe precisely what you want. I usually respond within 1 to 3 days. If I don't, please re–send the mail.
I've also got a patreon page now, so please Become a patreon. All patrons are visible in the patron list.