Jose, you can't buy them through the site, you have to email & deal with him that way. He'll no doubt get back to you when he can. Maybe he's away or something?
I got nickel silver rod through the bay & a lot of the guys use these guys, Micro Fasteners - Hobbyists Source - Locknuts - Washers - Machine Screws - Fasteners - Rivets - Wood Screws for small screws & washers.