Ok i can confirm that the advertised TK 200mm AF0046 is too small and as i thought has 170mm mounting holes.
Sent that fan back
next i ordered the ThermalTake 20cm 200mm Pure CFM - CL-F016-PL20BU-A This is the correct size 200mm with the holes in the correct place however, 2 issues, its not 20cm deep as advertised but 30mm deep and wont fit under the 'hood' of the case, also it has 4 solid posts for mounting which means the metal posts on the case wont slide in.
Here is a photo, please can someone from Thermal take help me out here? As this fan fits 2 cases that i know of both in the side and top there really should be something to replace it with!? its not that old.