What source are you using to but the aftermarket relay? British Customs sells one
http://www.british-customs.com/kisan...2-pr-1415.html a little pricey but has more features.
I got mine from an auto supply shop. My bike is getting service so I cant give you the part number from the one I used. I am expecting it back this week. If you haven't found one that works by then. I'll post the one I used.