Reddit mentions of 60'' Wide Aida Cloth White Fabric By The Yard

Search for Aida by the yard. Eg

60'' Wide Aida Cloth White Fabric By The Yard https://www.amazon.com/dp/B006P5SGBY/

That said, the others are right - you will want to adjust your count because if you genuinely want a single piece you are limited by the height of the bolt and I would be stunned if you could get more that 60in.

Also I hope you are a young person, I don’t think I have enough years left on my planet to stitch something that size !!

I bought some Aida by the yard on Amazon and am pretty happy with it so far. It's got a great texture and feels solid.

I haven't DONE anything with it yet, the projects I need it for are bigger than the frames I have... but I'm hoping to cure that this week.

I broke down and bought it online 'cause the only brick-and-mortar source I could find within 100 miles of my house was a cute little shop a few towns over, their 16-count Aida was $50/foot for 24-in wide stuff.

I just Googled aida cloth by the yard and this was one of the first results.

Edit: I realize this is 14 and you're looking for 18 I was just giving you a starting point for the search. I'm on my phone or I'd search more for you.

I bought some 14ct Aida from Amazon for a huge project. They sell it by the yard, which is nice to get because some patterns are huge.
http://www.amazon.com/Wide-Aida-Cloth-White-Fabric/dp/B006P5SGBY/ref=sr_1_1?s=arts-crafts&ie=UTF8&qid=1417467620&sr=1-1&keywords=60%27%27+Wide+Aida+Cloth+White+Fabric

Amazon. I don't know what thread count you want, but here is 60" by how ever many yards you want. http://smile.amazon.com/Wide-Aida-Cloth-White-Fabric/dp/B006P5SGBY/ref=sr_1_6?ie=UTF8&qid=1404521565&sr=8-6&keywords=aida+cloth