I would not go as far to say that. They both peg warmed for a couple weeks in my area, and they were in abundance at local comic shops. Hard to find at times yes...hardest..no. Your best bet to find these figures will be among the trading boards on this site or any other figure trading site.
I think you're situtation is a rarity JT. I also found Wave 5 to be the rarest/hardest to find of the TAC figures. I saw them at Kohl's and Target at various points, but they were never around long enough to warm any pegs in the twin cities area. Shockingly, a local target just got a fresh case of Wave 5 last week, so its entirely possible that other Targets in other areas will see these flow through in the near future as well. Could be an isolated case where they were just cleaning out leftover stuff from the distribution center, but maybe Hasbro is pushing more of these out now that we're in the middle of a multi-month lull.