Best place to buy a frame for a futon?

[Eeezee]

My old frame was busted, so I threw it out when I moved to my new place.

So now I have a really nice futon mattress. What I need for it is a frame. Anyone know the best place to find an affordable futon frame?

 

[tfinch2]

Ikea

 

[GeekDrew]

Walmart/Sam's Club occasionally carries decent ones, too.