I would first confirm what part they want you to find exactly if they'd be so kind, then find it on this site: https://www.parts-honda.uk by finding your model and year, might take a few trys.
Then look for the matching part on ebay
Yeah probably the case.
I'd much rather have a proper wheel though, I've driven with a space saver on and they're scary.
Plenty of original kits on ebay or scrappers maybe.