In a store near you (or maybe not)
(humor subforum :D)
serious answer:
1. This is a public forum, no one in their right mind will give you links for illegal downloads. For that you probably have to contact those who can help, in private.
2. You actually really can get it in a store that sells manga/anime
Kuromai from deviantART posts Kuroshitsuji OVAs from time to time.
Link: kuromai.deviantart.com
Unfortunately the OVAs are difficult to locate; most of them anyway. If they are listed on a site, they are usually removed within a week or so. Your best bet is to search for the title of the OVA by name, along with the keyword of which language you wish to read the subtitles in. The only OVA that has been released in the US, and has been dubbed is 'His Buter: Performer' There are presently 7 Kuroshitsuji/Black Butler OVAs Original OVA "His Butler, Performer" OVA 1 "Ciel in Wonderland Part 1" OVA 2 "Welcome to the Phantomhive's" OVA 3 "The Making of Kuroshitsuji II" OVA 4 "Ciel in Wonderland Part 2" OVA 5 "The Tale of Will the Shinigami" OVA 6 "Spiders Intention"
It's already finished. Soon they should be airing the OVA.
Ciel in Wonderland is the Ciel in Wonderland OVA, it has no episode number; but it does have two parts.
Young Grell Sutcliff and young William T. Spears are in the 6th Kuroshitsuji/Black Butler OVA called 'The tale of Will the Shinigami' or 'The tale of Will the Reaper'.
Kuroshitsuji was created by Yana Toboso.
Kuroshitsuji was originally a manga.
In the first Kuroshitsuji Musical there are 7 songs. In the second Kuroshitsuji Musical there are 15 songs.
There is no main character from Kuroshitsuji named Claudia. There is only Claude Faustus, who is one of the main characters in Kuroshitsuji II.
Kuroshitsuji is its own show and Drocell is a character in the show.
Unanswerred questions about kuroshitsuji can be found at the link at the bottom.
If they are a fan of Kuroshitsuji, I would recommend Hellsing.
As of now there are no plans for Kuroshitsuji Season 3 to be made.