Few questions about WiFi Pineapple

Hello.
After few days of reading articles about WiFi Pineapple Mark IV, I am interested in buing it instead of Alfa R36 I planned to buy for my AWUS036H. But I need few answers/confirmations about this gadget, because most of provided information is quite unfriendly to newbies like me.

The first question is, how to obtain WiFi Pineapple Mark IV? Yes, looks like a very silly question, but for WiFi Pineapple Mark IV there a few ways to do this.
1. Looks like the Pineapple can be build using Alfa HORNET UB.
2. The complete WiFi Pineapple Mark IV can be bought from http://hakshop.myshopify.com/products/wifi-pineapple
3. As I understood WiFi Pineapple Mark IV is the Alfa AP121U router with modded firmware.

First way is quite hard for me, so I am choosing from buying complete WiFi Pineapple Mark IV or buying Alfa AP121U and flashing Pineapple's firmware. Buying Alfa AP121U is about twice cheaper in my country. But I need confirmation that after flashing Alfa AP121U with Pineapple's firmware I will get the fully functional WiFi Pineapple Mark IV?

And the second question.
At the beginning the idea was to buy Alfa R36 to share internet connection from AWUS036H. So, is the Pineapple able to do this better or on the same level as R36? Articles say that yes. But I would like to get the confirmation, because AP121U with original firmware doesn't support WiFi adapters and 3g modems.

 

Mr. Penguin,
thank you for your answer.

I am going to buy AP121U from www.data-alliance.net. Looks like it is quite trusted place. And many people on forums say that all new AP121U bought from there are 64mb. No need to search, because most sellers do not write\know RAM ammount.

Do you mean building from Hornet UB?
I thought about it. After reading few topics, it looks quete easy and even cheaper than to buy AP121U, but here goes the silliest problem ever: I want the factory case for this board, but there is no places to buy it separately.

 

But I really do not know how to make case for this board, better than original one. Do you have any ideas?
The only that came to mind is to make simple "brick" from transparent thermoplastic.

 

S**t!!! The more I think about it, the more I want to do it.)))