4 pin relays for headlights

First of all, Power is Amps multiplied by voltage. P=I x V. A bulb that consumes 65 watts at 14.5 volts will draw approximately 4.5 amps. More or less.

You can get the 5-pin Bosch relay with mounting tabs on Amazon, as well as sockets for them. The relay is Bosch # 332019150. The relays are also available from Summit.

Parts stores that speciaize in parts for imported cars used to carry a Bosch relay kit that came with the 5-pin SPDT relay and the socket with pigtail harness but I don't know if that is still the case.