Unless you're interested in paying "collectors price" for a used one, I'd say find one and buy it in a hurry, or forget about ever getting a Marlin 1894 Cowboy (the hexagonal barreled 1894 in .45lc that you're referring to). Part of the Marlington take over was the discontinuation of the 1894 Cowboys. Maybe they'll bring them back in the future, but according to Marlin about 4months ago, these are out of the catalog and aren't on the production list for any foreseeable future.

Kinda sad. Hopefully some of my fellow cowboy action shooting enthusiasts will raise their voices and encourage Remington to bring them back, but that's not the buzz I'm hearing.