Enterprise Ireland do feasibility study grants, but the paperwork is horrendous. You'll need to weigh up the form-filling and public-sector-liaising time with the money you'll (maybe) get.
You have to pay the money first, and then you might get 50% back.
You really have to be geared up for this approach (grant junky). Be cautious that you're not changing your business to comply with Enterprise Ireland.
(I'd steer well clear myself.)
Forgot to mention, you should be exporting and/or creating jobs for Enterprise Ireland to be interested.