Where can I get older apps for my 3rd gen ipod touch?

[William]

First off, to eliminate stupid answers like buy a new one, I am poor. I have a 3rd generation iPod touch, it was given to me, and I would like to get some apps for it that I may actually use. I wanted particularly facebook, twitter, and a pokedex, and most of all, an E-Reader app so I can read E-Books. I have found plenty of apps, but I must update to IOS 4.3 or later, and now 5.0 for some of them. I have 4.2.1 (8C148) which a 3rd gen cannot update past. It has been jailbroken with greenpoison and has cydia app store, it also has winterboard (though I doubt that will help.) All I want is a way to get older apps that I can use. Since they are not offered to outmodes. (which is me...)
I did not see anywhere that Amazon has software. I do not wish to purchase something that has been free since it was released. I just need a place i can get software. Unless you know where they have apps for out of date electronics? Thank you for your help though.

[Sam]