I got this for my SRAM Juicy brakes and it works, there's a bunch of adapters including Formula but I can't talk about those.

https://smile.amazon.com/CYCEARTH-Bicycle-Ultimate-Formula-Hydraulic/dp/B07GVH2BXM

There's three price options, I got the $33 one and the solid highly durable syringes are well worth it, real good feeling in the hands.