I saw this build plate angled holder on Thingiverse. It’s used for holding the build plate over the resin tank after printing, while the resin is draining off.
This one stays permanently mounted on the build head. In contrast, the one that came with the Mars is a separate piece, and you need to do a three-handed juggling switch to get it mounted while it’s dripping all over the table.
Would anyone be willing to print this? The information on Thingiverse suggests it could just as easily be FDM printed.