If Chemical is out of stock. Try one of these :
BM-SOHO :
http://www.bm-soho.com/genre-home.php?genre=Underground§ion=4&subgenre=dubstep
Redeye :
http://redeyerecords.co.uk/asp/defaultMp.asp#
Boomkat :
http://www.boomkat.com/item.cfm?id=186732
Juno :
http://www.juno.co.uk/products/Wah-Do-Dem ...