Some of these companies also stock videos and Dvds

Oriental music online

Hossam and Serena Ramzy
Dance and Music products, classes and events

Tanz raum
Supplies Oriental Dance and Music products 

These websites provide information on Arabic music, artists' official and fan pages, audio and video clips, and Arabic dance history. New
www.mazikaty.com/
www.mazika.com/ar/default.aspx

They might offer downloads. Please check that this is legal before downloading.

Aladdin's Cave

Trehantiri

Arc Music

Layali el Sharq Music

Maqam Music
Definitive selection

Shira
A fabulous web site that provides the most amazing variety of detail you could ever want to know about Oriental dance.

Sterns
Sterns World Music Café. Excellent food, good music and helpful staff

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Persian music outlets

Farhangsara
5 Ashbourne Parade
Temple Fortune
Tube: Golders Green

Elsewhere in London, try independent Iranian-owned shops in
West Kensington, Olympia and West Ealing

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Turkish music outlets

Melodi Muzik
121 Green Lanes, London N16
Tube: Turnpike Lane - Map