I do NOT have a Staples here in Buffalo.
First tried to pay and have it printed by uploading it to office max & office dept and then go and pick it up. FAIL. Does not work, do not try it. After finally uploading it to one, paying and then getting a call an hour later from my local store saying that they can not fulfill my order because they do not have a printer large enough...and then having to call another number to get a refund...total pain in the butt.
I purchased the huge foam core board at Michaels. I had to ask the framing ppl for a larger piece than they had on their sales floor.
I hung it to the wall using the command strips for picture hanging.
Linking to these parties, here.