Solved the problem. I just used the stock VRAM heatsink from my HIS HD4870 1GB card
I just had to bend a little some of the Twin Turbo Heatsink fins so I can fit the VRM heatsink fins between the GPU Heatsink fins.
One think that everyone there should look out when implementing Aftermarket cooling is the cooling for the VRMs especially if you are overclocking.
Now my VRM temps when playing at full load and 75oMHz stock clock went from 95C to 85C. I will post my temps at 820MHz and higher once the thermal paste settles in a little. I'll also do some furmark testing too.