First off, I would recommend going to
http://www.pavoniexpress.com where the is a lot of good information covering this electrical fuse issue. You have one of the models they refer to with the resettable thermofuse.
As far as the rest, are you certain that the element is 'blown'? quite simple to test the element with a multitester by setting your tester on ohms and test across the ends of the elements....figure out which posts go to which elements (the two posts closest to the edge are one element and the two posts closest to the center are the other element)......almost all of your tests will produce no continuity except the right pair. If you get any reading at all across the element in ohms then likely the element is not burned out. the element can be shorted or broken continuity and this would produce a 0 reading, but if you get anything in between 1 and 0 the problem lies elsewhere, the fuse, or the switch, or even a short or ungrounded machine, so before diagnosing with parts it is prudent to test the element coils. If you have no multitester they are pretty inexpensive and even the el cheapos can do continuity testing.
As far as the price, you should likely, if you test the element as bad, talk with the supplier on the phone to make sure that you are getting the right element. the two coil model is pretty pricey and the one coil about half the price, so this may be the differential you are seeing in the two sources you name. The 95 dollar price is about last years wholesale for this part, so the lower price is either a tremendous bargain and you should buy a bunch and sell them on ebay or check to see what this part is exactly. All suppliers love to sell parts, but I would recommend that you make sure the part you have is bad before launching into a parts buying binge.
Now ask yourself, the machine is obviously very clean, at least underneath from your pics......so if the element if blown, then why? A heating element is a copper wire of varying thickness surrounded by a ceramic insulator, covered with a copper or stainless sheath. To be blown, the copper wire inside the rod has to melt, why would it melt? this points to the thermal fuse setup....is it good, again, more testing.
there is only one gasket between the heating element plate and the boiler...depending on the model year it will be either a flat rubber or fiber gasket or an o ring type gasket, so you should look to see which gasket you have. there are also replaceable gaskets (2) that secure the boiler to the base, one on each side of the base but unless your boiler is loose these should not be needed.