Good luck with that project, Nick. (Looks like more clouds and rain for me).
Yes, JPL Horizons now have ephemeris details for the mission:
https://ssd.jpl.nasa.gov/horizons/app.html#/
Edit Target Body to be Artemis II
Select a Location or MPC observatory code
Select a Start Time after 2026-04-02 01:47:08
Select a Stop Time and Step interval
(Times are UTC)
Click Generate Ephemeris
Alex.