Yea, most people just buy stressers, there are some 5 dollars a month, but I wouldn't trust any mainstream one as some have been known to be backdoored, and some get hacked and the DB gets dumped and the IP's of each account are sent to authorities, so it really is dangerous both of the ways =P.
Also, just a hint for the op. You can always use port 80 since it's an UDP Flood.