You mean Ddos attached right? If so some of the major hosts will be able to help you, hosting companies like Liquidweb for instant are just awesome in handling Ddos attacks and you don't have to spend a fortune. Others say CloudFlair has a good ddos protection, it may be worth to look into, not sure about the costs and the protection level.
Anyway, above depends on what you are actually selling, if it is stuff that isn't allowed you will have to make use of these very expensive "underground" services used by these SCAM Forex Trading websites that you can find over there at another fraud forum that support them... Google Gold money or Forex trading and you will find them.. the ddos protection there is at overprice and totally outrageous but cheap for someone with limited options.