That's really kind of you although I suspect the genuine article should come with stainless screws. I will let you know. I might however add a clone at a later date though in which case a couple of extra ones might be handy.
I've got the hcigar clone kayfun, no problems here. It's been sitting for over a week after last wash but not dried. And there is no sign of any rust on the screws. But it is pretty new, so they my have addressed the issue.