I just figured they decided they didn't want to sell them anymore.

Cuz for $450+ they're going to sell waaaaaaaay fewer of them.

Would make for a fun(?) dyno shootout.
The $450+ hyd cam vs a couple of similar grinds that are 1/2 price(or less).

Some possible candidates:

Comp PP292H
Comp 296H-8
Isky Mega-Cam 292-108
Howard's 722251-09
Lunati Street Master 295-108

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads