Is there a online store?

[BlankStars♠]

that sells large size sticker that can cover my entire NZXT s340 mid tower case? (front/side panel) just want to add some style on my case and hide some ugly scratches 

[Linksys120n]

Well the fact that your case is only 1 out of about 10 billion different computer cases on the market. Finding a sticker for your exact case will be quite hard.

[yathis]

ebay sells stickers

[EunSoo]

you can get a vinyl wrap

[LienusLateTips]

16 minutes ago, Linksys120n said:

Well the fact that your case is only 1 out of about 10 billion different computer cases on the market. Finding a sticker for your exact case will be quite hard.

S340 is extremely popular.

[LogicalDrm]

Any art store, any store for car stuff.

 

Though, are you looking for plain sticker or something pre-cut? TTL (TinyTomLogan, OC3D) said in one of more recent videos that decals on his case are from digital design company. So if you want something more original and/or artistic, you need to pay bit more for someone to do it. Give them dimensions, maybe few pics of the case or even 3D model of it. Or if you do it yourself, get some plain stuff, print template and draw&cut to size.

[wzrd]

http://www.coldzero.eu/ Do custom printed vinyls, GPU backplates and the like. Specifically designed for PCs and they can probably do it to exact spec for your case. Usually takes about a week to make and ship from my experience.

 

I use a lot of their stuff in my builds and deal with them on a regular basis, really good to deal with!