Pocket pistol

I'm wanting a backup GBB/NBB pistol.

Saw this:
http://www.gunnerairsoft.com/catalog/product_info.php?products_id=1383&osCsid=d8945a2b9f53fc9bc4b54981cab69eb2

Anything comparable to it? Im liking the mini 1911 look, but Im open to other styles.
I'd be real interested in a Walther PPK...(Maruzen makes one, but its like $125)
Preferably metal. FPS doesnt matter. Green gas or C02. Small. Under $100.

^^^^^^^^^^^^^
Thats all I ask.

HFC makes some little tiny pistols called the commanders. They're like three or four inches long and $20 a piece. Haha, that's about all I can think of