Are you looking for the actual Canon lens hood that is pictured (or a generic) or something like a French flag that would be on a matte box or that you could could just put out on a flexible arm to shield from unwanted flares?
Run&Gun, sorry for not seeing your reply for this long!! Thanks for checking in!
I am looking for a lense cap, for the hood, of the pictured wide angle lense... plastic cap, like, protection during transport, etc. Not looking for a matte box barn door or flag.
I'll try to check back here sooner, sorry again for slow reply!
The lens hoods and caps from the manufacturers were always kind of pricey. You could try reaching out to Canon directly. I didn’t see them on B&H during a quick search, but I have just used the Porta Brace lens covers on my ENG lenses for probably the last ~20 years.