Thanks jglerner for looking into this for me... but...
The url I sent only (for kindle 2.3) only has the fonts packaged for kindle 2, kindle 2 international, and Kindle DX... it does not YET have the package for Kindle DX international (which is the only DX that Amazon sells now).
The link you sent explains everything (which I think I understand), but does NOT have any links to large fonts packaged for the DX international. There are some fonts for the DXi, but they are unicode (for foreign languages) rather than large.
Anyone else know how to get a hold of TedSan?