I'd go for a decent branded pattern part or like Wurly said, wait for a new old stock pump to come up. I don't know how you personally search on ebay but if you put a really broad search in such as "honda waterpump" you may find one listed which the seller doesn't know what car its from. You just need to find your part number out

look at pumps listed for the 3g accord too as they use the same engine, but double check part numbers etc before purchasing. This is all if you don't mind trawling ebay for hours btw lol
The good thing is the waterpump isn't run off the timing belt so if the pump goes its not going to damage anything that way, it will just be the overheating you need to watch out for. Shouldnt be too hard to change either as you don't have to remove the timing belt
