No vehicle currently in use by the Irish army is done in 28mm, except maybe the Scorpion (which they don't have many anyway).
The AML-90 is no longer being used and I've never heard of a ACMAT being used by the Irish.
The two main vehicles in use are the MOWAG (the two variants one with cannon and one without) and the RG32M/Outrider. The latter is in coming out in 20mm in the next few months, along with an expanded range of Irish in 20mm by Elhiem. No MOWAG in sight though.