I would think if you used some hardened 4140 plate and water jetted or wire edm if you want to get real fancy it would more than hold up the that bolt head.
Could also get it nitrided or case hardened if really concerned about it.
Draw it up and drop it into xometry and then it is a purchased item it just has some lead time.
I used them for some Aluminum brackets for my boat and worked out great.
