I know about the fan kit but if I order it will take about a month to get here and I prefer not to wait so long (and to be honest 10 bucks for a fan and acrylic cover seems a bit high), maybe ill get one in the future.
Regarding the heat sink ā I have several with the dimensions you mentioned here.
I will try to make some modifications, it may not be pretty but hopefully it will be effective 
Ill upload some pics and temp measurements when Iām done.
Thanks again!