02beinnh,
Foam cushions are very expensive at retail prices. I have had some custom work done but bought my own cushions and brought to the seamstrest. Here is an excellent site to buy the cushions on your own and the prices are the best I found after lots and lots of research.
WWW.thefoamfactory.com
and the shipping is free over $75.00. I was able to pick out my own fabric at Joannes when they had a great sale.