Don't want to use any relay - want to keep it PIAA as I plan to sell the bike with them PIAA lights and harness on or seperate them to sell on this site.
A PIAA relay is almost certainly a bog standard ISO relay with a plastic box glued on it that has 'PIAA' stamped on the outside, all yours for only 3x the amount of the bog standard ISO item
The quality of your shrink wrapping, connections and general loom quality is far more important