throttle locks

I am getting ready to ride across the state to see some family and was wondering if there was a type of throttle lock that i could buy for my rr. I have seen cruisers with them so i know they make them. just never seen any for sport bikes

http://www.ironpony.com/ironponydirect/productPagedetails.asp?ImageName=UNIVVISTACRUISE.jpg&Kitkey2=UNIVERSAL%20CRUISE%20CONTROL&Brand=VISTA%20CRUISE&Class2=Handlebars%20and%20Controls&Class3=Cruise%20Controls&Class1=STREET%20PRODUCTS

You might be able to find it cheaper but this might be what you are looking for.