http://www.homedepot.ca/product/bett...-roller/409976
Less than 12 bucks?
We've replaced the screen in our patio door a few times because of kids and dogs trying to go through the damn thing without opening it all the way. These kits come with standard sized spline, the screen, and the roller tool to put it all together. It's a little bit finicky, but it's not very hard. I've done it so you know it's not rocket science.