The RtS Battle in Space 2-pack (Rodimus Vs Cyclonus) was found in America December 24th, for US$20. Apparently isn't a store exclusive - is probably like the Classics Leaders 2-pack (with the Tank Megatron and Optimus with spin gimmick) that came out in 2006 at various stores, or the more recent TF2 Bumblebee Vs Soundwave set.

And the Power Core Combiners 2-pack wave 4 (Groundspike, Skyhammer), which were out in HK about a month ago, have now been found in Canada. Apparently they haven't even been found in America yet.