Legally? not that I can think of. Get Hasbro to make Michael Bay to use it in his next movie so it becomes an official item they will want to sell ? Know anyone at Hasbro? Know Michael Bay? :/ I am in the process of chatting with SW to get their legal team to maybe reopen that conversation if possible.
You are right, however, some of these companies can be quite trixy...Some will leave you alone...but, they will leave you alone until they suddenly feel they should sue for damages caused to them by my selling a few items. I am not down for legal dramas.