I looked into this a little bit many years ago, Annie, when I got something in the mail promising to send me the “original, genuine Herlocker family coat of arms” — which I found odd, since our name had been Hörlacher until my great-grandfather changed it and we’d been, from all I discovered in my genealogy studies, just good German peasant stock. [Side note: if you want to find ancestors back to the early 1500s, hope that a relative converted to LDS (Mormons). They “retroactively baptize” their ancestors, which means they spend time and effort researching blood lines so you don’t have to.] Most families do not have coats of arms, which are big deals in Great Britain (shout out to Stuart James and Tracy Aston and any other Brits who can confirm or deny) and not handed out on whims.
Doesn’t mean someone won’t sell one to you, though! My mother proudly displayed the “family crest” which she’d bought from a mail order group (at least it said “Horlacher”) which (surprise!) looked totally different from the one that other group had tried to sell me. Still bogus, of course.
If your hubs doesn’t know for sure what his crest looks like, you can easily find an online group who will send one to you. Just Google (sorry, DDG) “family crest <last name>” or “coat of arms <last name >” and you will find plenty of places that will happily send you something printed, framed, or carved. It won’t be authentic, but it will look great! And if you just want him to feel good, that might be enough, my friend.