Carmen, we looked around at muzzles a few times and all they sell here is the basket wire types. But, I don't think my little Turdie would be happy with a muzzle on his face.
It's not that we can't necessarily afford a crate, though if we bought one here things would be fairly tight for 2-3 months afterwards. I mean, if one of the animals were injured we would certainly pay 200€ or more without hesitation, but when it's just a plastic box, Sami has LOTS of reservations about it and I have some. But, if we can't find another solution, we'll get a crate.
Jane, considering the size of crate that Seamus needs, shipping internationally would still be a bit pricey because the box would have to be a bit over-sized. But, I'll think about it if nothing else comes up.
Right now, we're going to give Seamus a few more tries in the bedroom with the cats. He does a bit better and focuses more on shredding paper, chewing on wood and ripping up the carpet rather than seeking out electrical cords. Albeit, eating paper, carpet and wood isn't exactly SAFE/HEALTHY for him, but it's better than him chomping into an electrical cord.