You can pretty much use any leca that you can find locally. Of course they may not have the wonderful wicking power of primeagra, but it'll work. The stuff I use doesn't wick all that well, but the plants are doing fine so far, especially after adding a layer of sphag on the surface.
As for pots, you don't really need the custom made pots. You can convert soda bottles into pots, or even better, find some 32oz deli containers (like this for example:
www.ebay.co.uk ) that you can put some holes into. That's what I do, and deli containers make nice pots!