You should look through older posts, I am pretty sure this was a topic recently on what vendors we all liked for paper liners.
I get my white ones from Restaurant Depot. It is about 500 for under $5.00. Some also, mentioned Ebay if I recall. I've never done that but who knows. The price may be great but check the shipping cost which end of higher than you want to pay. Look into Candyland Crafts too.
Good luck.