I used the 2D shape by @UFAB_154408 and made it 3D...

I printed it with golden PLA and it looks just fantastic. During my print the peek at the top wasnt really a peek but like a poop. I anyway let it be there because it is also kinda astethic.

You wont see anywhere but the bottom print lines when you print the parts seperately flat on the print plate.

Maybe it is a bit tough to get the parts into the bottom. Then just go on and try it with the next piece. Usually all pieces will fit together. If not just use a file to take a bit material. After having all pieces put at the bottom, just use a band at the top and glue the parts together so they will stay like this. Insert the middle rod at the very last end but before you glue it so it will push the other objects more in the perfect fitting.

(Sorry for my bad English, I am German…)