Being outside eurozone only excludes PTSB.
Without setting up a company, I understand that AIB & Haven will look at it.
Dilosk possibly will (they definitely lend to companies). Dilosk also do interest only mortgages. If you down company route, Dilosk would probably be first option.
Because they'll only use the rental income, not only does it have to be cashflow positive, but the rent would need to be 120% of the stressed repayments (current rate +2%). You'd also need 30% deposit (i.e. borrowing max 70% of the value).
Going down the company route is messy, expensive, and not tax efficient. Make sure you understand all that entails before pursuing it.