Here is a link to a sign supply company (US) click on the blades & blade holder catagory. There are quite a few brands of blades and holders offered. The standard is Roland ... easy to get replacement blades. I'm sure that Roland is available in most of the world.
http://www.signcatalog.com
A major consideration is the downward force of the blade into the material ... too much will cut through the backing paper.
Here is another link to give you ideas
http://www.aeronautauto.com/pages/consumables.html
Notice the blade holder at the bottom of the page, it also uses the roland blade.
My thoughts on using the Roland blade is that most software has settings for the blade offsets and tangentigal (sp?) movement.
BTW, I have a Roland vinyl cutter and sign making software. The speed it cuts is amazing.
Hope these links give you some ideas