Can you get a keyboard for a kindle?

So I have the kindle were you have to press a button and they keyboard appears onscreen, this is a nightmare because it is so hard to search the web because it takes so long to type in an address.

I was wondering is there a such thing as a portable/plug in keyboard for it like this portable keyboard for an iPhone

If there is please locate me to a link, and I am not going to just buy a new kindle that has a keyboard, thats just idiotic when I have a perfectly good kindle.
Added (1). I don't have a kindle fire. I have the 4th generation Kindle were you can just get WiFi, no bluetooth.

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