RAMBo Frame for Prusa i3 Hephestos
You will need five 3mm x 10mm bolts.
The slots in the crossmember should hold the RAMBo Frame and Prusa Bracket parts with a very snug pressfit alone. You can use glue if you wish, but it should not be necessary. This will depend on your print settings, of course, and I am willing to provide my Cura profile for PLA if you need it. I printed these parts on my Hephestos with the default PLA settings, except updated for the correct nozzle size.
You can modify this part using the free Onshape file:
https://cad.onshape.com/documents/596f24e66c174c15bba4f15c/w/f395414ca52b4ca291a08420/e/a549087c25ab4ad6b2671228
The original design is for Prusa i3 Hephestos by bq.com. The bolt pattern and side clip match the stock frame of BQ's Hesphestos.