Trying to break your car doesn't make you fast... It makes you look stupid. And betting your car that you can run a faster time than someone who actually knows what they are doing makes you look like you've been watching to much Fast and the Furious.
Like others here have said indirectly, I would recommend Maximum Motorsports, as I have run a set on my dirt stock car for a couple years now without the slightest sign of fatigue, and they work great on the street car as well.
Custom ground, TFS stage 1 or a mild Anderson, probably in that order as well. TFS stage 1's cheap if your looking to be on a budget,, and its not bad if you upgrade heads in the future.
I bought the summit ones basically brand new and was pretty surprised with the quality, very nice. And very comfortable as well although I have just sat in them on the ground and in the car when I was mocking up the brackets.
I just bought the ES engine mounts and tranny mount off ebay about 4 days ago, and got a good price, great customer service, and quick shipping from neverenoughauto on there...
five minutes on google got me this. http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=9085 hit where to buy and it will show you all the locations. I believe they will ship it to a ford dealer near you as well.