That's the one I was going to link.
If he's out of them, there are others here who can provide.
Just get it done. Screw waiting around. You've got a vehicle to enjoy. A DII isn't made of glass. The non-serviceable shaft was just a stupid choice for something that close to a cat.
Get a new one and drive the thing.
As for the key, you don't need anything special. I've got several remote-equipped keys, but only for convenience around town. When I'm out and about, I don't fuck with them. I just use a plain metal key. Blanks are readily available.
The remotes are only remotes. They serve no other purpose. They are only on the key to make it look cool and modern.
If your key is acting up, have a copy made (unless you have a spare), and file the sharp edges just a bit. If yours is already very worn, get another blank, file it into shape, and give it sharp edges.
Cheers,
Kennith