Thanks for the responses.
My source for the "rumor" is a letter from Kodak which was posted on a large format website -- the claim is that the demand for these kits is low.
Apparently, Glazer's (in Seattle, where I live) still can get some kits -- I have reserved the one they have in the store and will buy some more when they get them in.
I guess the best policy for me would be to buy as many kits as I can and store them in my downstairs refrigerator. I think 5 or 6 kits should be enough for the next 10 to 20 years, after which film availability might be a problem. Each kit develops 10 rolls of 120 film.
Even though the kits are supposedly for "single use", has anyone tried to use the various replenishers to allow re-use of the chemicals?