I just looked at the MAX7221, which in single quantities is over ten bucks. Plus the shipping. Yow. On the one hand, that's the difference between affordability and not, for small projects. On the other hand, that's an even bigger "how do they think they get more profit out of me by giving it away" guilt.
Maybe I can help you this time 
See if this will work as a sutable replacement, $3.55
Here is the Datasheet,
http://www.2k1.co.uk/components/austriamicro/AMS_Displays_Interface_ICs_Catalogue.pdf