The Pozilla software that comes with the Police Call book (it's on the CD in the back...) works fine for occasional use. (I like it fine, but many don't).
RS sells Police Call for $20, but you might (probably) get lucky and find a 2004 or 2003 copy at your local shack for cheaper (probably $5 or $9)...
If you're REEEALLY lucky, your local library will have a copy that still has the CD in the back...