I don't know if they were Italian or not but I'm fairly sure Bricomarche in Pombal had some pellet fires a few days ago........ Sorry I can't be more definite but I only half noticed them as I walked past looking for something else.
This German company: Produkte has a PT agent if that's any use to you & I'm sure they'll put you in touch with your nearest agent if you contact them.
I've actually got a pellet fire which was installed 2 years ago. Now it needs a vital spare part, which the local (Tavira) supplier seems unable to get - been trying all summer apparently (so he says). So I'm trying to find another agent for the manufacturer: Caminetti Montegrappa. The fire is a good piece of kit and I suspect the part I need has failed due to bad installation. With chimney work it cost best part of 5000 euros. Still not given up!