Hi, Ted,
According to the info on the Apple LE Crossgrade sites, the Crossgrade order had to be postmarked by June 29.
This may change. However, I assume that they have a 7.3 version coming out soon, which is why they pulled the 7.2 option (just guessing).
Here are the two links (USA and UK) that I know of.
Check it out:
http://www.apple.com/universal/crossgrade/
http://www.apple.com/uk/universal/crossgrade/terms/logic_crossgrade.html
WH