Motosliders make a range of crash bungs for Honda CBR and various Suzuki models (http://www.motosliders.com/suzuki.html)

Cost $170 including freight to NZ. Impressed with the single strong bolt that goes right through engine and frame (replacing one of the existing engine / frame bolts). Bungs have a decent length and they sell replacements. A NZ outfit on trademe also will make replacement bungs.

They were easy to fit and required no additional engine support. Need to have a torque wrench so you ensure you tighten appropriately

Worth checking out of you need a set for your Suzuki or CBR. Good reviews from people on http://forums.sv650.org.