I made a collection of free stock exercises for drumline for exactly this purpose. Squarespace kind of sucks with the downloads, but the only info you need to fill out is your email to download it.

https://www.opensourcepercussionist.com/downloads/traditional-drumline-warm-ups

I don’t think this violates TYB ad rules, because it is free and I am not selling anything.

For front ensemble, Keller Central has a pretty good packet online for free:

http://static1.squarespace.com/static/5550c55ae4b07412a6c63de5/t/55d73de7e4b0d6e151392803/1440169447907/Front+Ensemble+Exercise+Packet.pdf

For something more in depth, Impact Percussion has their old packet online for free as well:

https://impactpercussion.org/wp-content/uploads/2018/09/2019-IMPACT-Percussion-Front-Ensemble-Packet.pdf