EU Transponder help needed, (Replacement?)

Hey everyone. I've got a Mitsubishi Galant 1999, sold in Sweden. (I apologize for not finding an appropriate EU forum.)

I've got a bit of an issue with my transponder. When I bought the car Pre-Owned the key was in a horrible shape, so I tried to fix the buttons(the plastic that triggers the button itself)
after a lot of tinkering with glue etc to fill the holes in the transponder, the button got stuck. I tried to replace it with another button I had laying around, but I failed.
I'm now looking if there is a way to buy a new one and program into the car.
Thanks in advance. This is what I have..
http://i.imgur.com/WHkVZFK.jpg
http://i.imgur.com/JwW1NTR.jpg
http://i.imgur.com/Cnb4rmH.jpg
http://i.imgur.com/iYpQDaG.jpg