Navigation disc for 2003 es 300

[Dave Beechuk]

My wife drives a 2003 ES 300 and needs a disc for her nav system.  The old one is shot, and I bought new ones (2 discs - one east, one west US) but now they've failed.  Does anyone know where I can get a new one that's reasonably priced?  I only paid ten bucks for the replacement discs and am willing to pay more now that I've seen how those performed.