Hi, wondering if anyone could recommend a Fire Installer (MUST BE HETAS APPROVED, so as not to affect house insurance)?

I would like to install a 6kw Multi-fuel Inset Fire, to replace the electric fire i have in the living room.

Have tried the Heat Centre @ Wick but they're not HETAS approved and have emailed greatglenstoves.co.uk but awaiting response...would ideally like to get a few quotes.

Thanks in advance, any help will be much appreciated