I have purchased a couple of pieces that were only available digitally, and I am wanting to print them out to put them in the library. The problem I am having is that the parts are formatted for 9 x 12 paper.

Where can I:

a) find 9x12 paper to print it myself?

or

b) Take the files to have them printed?

I know common sense would state that I just suck it up, click 'fit to page' and have done with it on 8.5x11, BUT I know that larger paper is heavier weight, I want this to last for a long time, and I want the parts to be professional and not the cheap-as-possible tissue paper that districts typically have on hand to print with.

Thanks in advance!