The price was about half of some others I saw online! $18.46 for two.
These seem to be the ticket, but one of the 4 was bad. I emailed the vendor and got a quick reply that a replacement would ship and I didn't have to send the bad one back. She sent the tracking number two days later (on Sunday!).
Edited by Ellis9, 28 October 2013 - 11:57 AM.