Remixed the excellent Bambu Lab X1C plateholder to hold the smaller A1Mini.
Easy print-generic PLA fits Diagonally on the A1 Mini plate.
Printed in about 1 ½ hour. No supports, brim helps.
Might consider printing the “feet” another user has posted
https://www.printables.com/model/275928-bambu-lab-x1c-plate-holder-feet
might need to resize in slicer to fit