Per my experience, Spyderco does not routinely stock parts for their knives. If it's not US-made, they will be even less likely to have parts for a knife. So whether or not they would have your washer available would be a crap shoot. Things like clips that are expected to be goobered up, you can usually get through the mail for most of their knives. If the washers are a standard size across different knives, like screws, they may have them.