I sing and accompany myself on piano at small events, birthdays

Hey all. I sing and accompany myself on piano at small events, birthdays, restaurant gigs. My issue is the key: a lot of songs are too high for my voice in the original, and I cannot transpose on the fly while singing. I usually end up writing out my own versions, which takes forever. I am a baritone, so a lot of pop songs sit uncomfortably high for me. I have about thirty songs in my set. Are there sheet music stores that let you get piano and vocal arrangements in a different key, or is there an easier way to handle this?

Transposing on the fly while singing is brutal, I gave up on that a long time ago. I buy piano and vocal arrangements from Note-Store https://note-store.com/ and their FAQ has a question exactly about changing the key of sheet music you bought, so I would ask support directly, they say real people answer, not bots. For songs that are not in the catalog, you can order a custom arrangement and specify the key you need, it takes about three days according to the site. Another trick: buy the MIDI file as well, many programs let you shift the key and hear it before you print anything. It saved me hours compared to writing out my own versions. It also made rehearsals with the occasional guest guitarist much easier. Which songs are giving you the most trouble?