R&G crash bungs are the only ones worth fitting, that don't require cutting your fairing to fit them. Make sure you order ones for the fully fraired SV (link below)
Motosliders are better, but the fairing needs sading down to fit them.
Don't buy any of the cheapo crash bungs as they just snap and break
I think Intobikes is the cheapest place to buy brand new
http://www.intobikes.co.uk/products/...latest&sd=DESC