Think about a black sable colored German shepherd, characteristic of eastern European lines. They have a high energy drive like BelMals but will have an off switch.
Our rescue does not do out of state adoptions but (Los Angeles) Westside GSR does and they should have a few that meet your needs.
http://www.sheprescue.org/Available%20Dogs%20New.html
Thank you for that information. I would think getting one as a puppy would be better since you can train it the way you want and there’d not be any ‘quirks’ that a mature BelMel might have.