I bought the mounts online. The last two mounts together were about $200. I think one was about $110, and one was about $90. The two roll resistors were cheaper, I think around $50-75 each. However, I think the price varies, dependong on the year model, engine, and transmission.
There's nothing to remove, other than the mounts themselves. At least, that's how it is with the zetec mtx. If you remove and replace one mount at a time, you probably won't have much of a problem with alignment. If you should remove all four at one time (although I don't know why you would do this), you could have a major alignment problem. Ford has a special tool to help align the front roll resistor, and once it is locked into place, the other mounts are fairly easy.