Im in the exact same situatiuon, boiler went under 2 weeks ago, have done a lot of legwork into it , I looked further afield and have came up with an awful big difference , I've given the chance to the Irish suppliers to compete but none have came up trumps.
So unfortunately as much as I would love to keep the money in our economy I'm sure as hell not going to pay a 50% premium for the privilage.
Check ur pm if u want a copy of my quote, the price you've got seem to be awful expensive especially for such a small boiler