How could you possibly go wrong with beadboard? If you're looking for beadboard wainscoting sheets, then it would be a good idea to either check out Lowes or Home Depot home improvement store. Both of these super stores have a nice selection of beadboard wall panels which would make it easy enough to get some of this up on your wall, without spending too much money, or needing too much equipment!
Even though these beadboard wainscot panels aren't made out of real wood like the traditional beadboard does, it certainly looks like it, so if you're mostly concerned with creating the perfect cottage look, then you would get pretty far with these great products.
At Lowes you can find these panels by FashionWall as well as EverTrue. At Home Depot on the other hand it appears as if you can find other brands available. The price range on all these panels are rather similar, so it doesn't matter much which one you go for, however they all offer slightly different designs, but overall you probably couldn't really tell the difference.
Style: charming, sweet, classic
Fits Where: on the walls
Price: $$Indoor / Outdoor Conclusion: It makes a lot of sense to simply get one of hardboard panels that depict beadboard since it's lighter to work with as well as cheaper.
FashionWall 3/16"D x 4'W x 8'H White Hardboard Wall Panel
"Authentic beaded look adds charm and a custom look to any room. Prefinished surface allows the panel to be installed as is, or it may be painted to match decor. Easy to use and install. Formaldehyde free"
More information at lowes.com
32 sq. ft. Beadboard White V-Groove Panel
"Use the 32 sq. ft. Beadboard White V-Groove Panel in a variety of applications around the home. This panel is designed to provide the look or real bead board, and can be painted to help suit your chosen setting and use. For use as wainscot paneling and in kitchens, laundry rooms and garages. Beadboard construction. Designed to offer the look of real bead board without any additional sanding or painting. Can be painted to help suit your chosen application"
More information at homedepot.com