Verified answer

I know of one brand of knife that looks just like his switch blade. It's called a spyderco vesuvius and since it's like a custom type blade, it might cost a lot. Here's a picture:

http://customtacticals.com/wp-content/uploads/2008...

You can always make one too, with a cheap similar knife's base and plastic, cardboard and silver paint. Keep in mind that if you're thinking about cosplaying, conventions won't let you swing around a real knife in there.

Edit:

There's two on bid on eBay right now, however they're the limited edition blue inlay ones with teeth like ridges on the blade near the handle:

http://www.ebay.com/sch/i.html?_nkw=spyderco+vesuv...

There are also other Spydercos which look like Izaya's blade and here's an Australian site I found which lists a range of them:

http://www.au.best-price.com/search/landing/query/...

Literally all of the knives will link you to eBay Australia or another online store.

Seeing as how you're a collector of sorts, money isn't too much of an issue for you then ? I myself love collecting anime plush and when I find more space to display them, will think about having some weapons too.

A swap blade does not turn in keeping with say, the "swap blade" which you're thinking of has a button and the blade comes from the interior portion of the knife so no in otherwords you do no longer very own a swap blade you very own a pocket knife and judging which you probably did no longer point out the size i'm guessing the blade is sufficiently small to be seen criminal, even however if for some reason you do get searched you greater beneficial have a rattling sturdy reason of you have a knife and maximum commercial shops and department shops and different issues alongside those lines have finished weapons bans so i might refrain from carrying any knives till you plan on gettin' in some hardship you could no longer get faraway from