How very nice you are, trying to recreate the tarnished bracelet in silver!
I don't have any advice to offer about finding beads, just wanted to say that I recently took some broken sterling earrings to a bead-and-jewelry shop that has a large custom and repair department. They had difficulty locating replacement sterling findings. In fact for one finding, a stone mounting, they couldn't even give me a price in advance because they said the prices of such things have been ricocheting around so much lately with the price of silver. All they could say was that the finding's price might range anywhere from $4 to $26. They wouldn't know until they placed an order with their wholesaler. It's been several weeks and I still haven't heard back from them. It wouldn't be hard to assume that sterling beads and findings are getting harder to locate because of tumultuous metal prices.