They sell both CD's and DVDs. While copying copyrighted material is obviously not condoned here, it is a double sided DVD-R, which has something like 8 GB of data on it. There is no where to download it, but you'll need a double sided DVD burner to make a 'backup' copy. There are posts on which software works best and which doesn't (over in the V forum, I think).
You'll have to order the disk directly from Zenrin, as they don't have downloads, but at only $190 for a DVD with free shipping, it's a bargain compared to the Cadillac disk. They currently have a 4 week backlog, though.
You may also be able to buy someones older disks, who've upgraded. EBay is another option.