My Artic Accelero S1 Plus came with some sort of vreg cooler which you can add using themal glue, i tested it on my GTX 650 that has the same "casing" from the mosfets and it works but is a great hassle.
Maybe there are some complete vram cooler availible for the 79xx? I have seen several ones with pushpins.
please show us a picture of the complete card! Are there mounting holes?
Use two of these on two mosfets?
Or just google for: SCVCH-1000 they are 22mmx10mm (and 8mm high)
i finally resorted to the ebay generic copper ones:
they are called RHS-03 and i paid 6€ on ebay, got them from england and took 10 days
They come with some sort of acid thermal pad and stick very well upside down
to give you some idears:
Warning: they list yous some here as a "b2b shop" which ships from china, just get yours from ebay or Amazon and just use THIS as size helper
Final words, i am by no means responsible for where you buy and how much you spent and i am not affiliated with those sellers in any way