It was mentioned that they are OE Hella relays, you can buy hella relays at about any autoparts store along with Bosch relays. If someone posts the schematics that are on the sides or tops of the relays I will look for the Bosch equvalent. Be warned though Bosch relays arent always that cheap. Yes some are about 6 bucks a pop but others are not so cheap.
http://www.wiringproducts.com/index1.html
Check out this website. You can see the internal schmematics on the enlarged picture. Match up the schmatics to the one on the Triumph one and match the amperage and voila.