There are many scraper models here, but I prefer these cheap plastic razor blades. If you buy them there is often a simple scraper included, which works pretty well.

This is just a holder to keep it in place. This version is best mounted to the wall (printer?) with double sided tape.

Best printed as oriented in the stl file. Take care of good bed adhesion. If you have problems use a brim.

No support needed.

I also made a model for the the Ikea Skadis peg board.