Mt brd motor mount suggestions/help

Hi. Building an electric mountain board. If anyone has any ideas on how to make motor mounts, using bolt together items from Home Depot/Lowe’s, etc. I would greatly appreciate it. I may use the trucks in pic. But would like to find something better, used/new. I’m on a budget. Also, could us a pulley (72 t or so.) Thanks.

I’m in the Los Angeles area.