As a collector of Classics/Universe, I understand your pain in locating these two too.
Universe Ironhide was in great abundance when it was released but is getting very difficult (and expensive) to track down.
I traded away my loose one recently and went looking for MOSC one and had to get one all the way from Germany since it was still reasonably priced there ($35 AUD shipped).
The Henkei version is naturally more expensive and equally as difficult to locate too (the few that I have seem, when they do pop up for sale, command over $60).
From recollection, Universe Ratchet was released on the tail end of the line and was in the last wave, along with Hot Shot.
As Hursticon has said, it wasn't made available here and was primarily released in the US (however, NZ also received it too).
The Henkei version is extremely rare seeing as it has superior paint apps to the Universe version and costs a pretty penny if you can find one.
I purchased a MOSC one a few weeks ago (since I had also traded away my loose Universe one) and it set me back about $80.
Your best bet in acquiring these two (at a relatively good price) would be to perhaps keep an eye out for group listings where a seller is selling off a couple of figures in the one lot.
Good luck!