Print postnet codes in MacWord

I'm glad I finally switched from a PC to a Mac. I'll never go back to the Windows mess!! One feature I miss, however, is the ability to print USPS Postnet codes (ie zip code barcodes) on envelopes and labels with MS Word. Is there an easy way to do that with MS Word for Mac 2011??
Thanks,
bidwin

USPS has moved to the Intelligent Mail Barcode as of Jan 28. All of the solutions I found by searching were pretty expensive for the font.