Do you have an ebay link for these heatsinks / radiators? I would be interested in these. My S5s fans have their ar$es on fire since summer started.
It's a picture of S5 shipped by Bitmain (Sic!). I was expected my S5 will arrive with such radiators too...
Take dimensions of copper plates where you'll glue the radiators and dig the Internet - e-bay, AliExpress, Dealextreme....
p.s. I'll take care of it some day soon, you may just wait a day or two.
Always use a thermal epoxy so they stay put. Just a small dollop per sink is all that is needed. Also conducts heat better than thermal tape.