Hello there!
This is a little something i made for myself, figured i might aswell share it with everyone else! The covers should easily slide into place if you push them along the aluminium profile, yet i cannot promise if the tolerance will work with your printer/Settings.
Not everything you need is 3D Printed, the holder themselves are yet you still need some other parts:
Feel free to change the model and upload it as a remix, if you have to use other Materials or parts!