Have you tried the Azalea site?

You have to purchase, essentially, the barcode fonts.  The Azalea UDF is the most integrated option for Crystal.  But, it's pricey.

I had excellent results with Carolina Barcode in a previous Access project.  I have not tried it with Crystal Reports.  The price is much more reasonable.  And, the fonts are actually nifty, in that you turn options (such as the characters appearing under the code) using bold, italic, etc.