Meh, I have chemistry classes + I just spent two days doing research at a bio lab here in Norway. Lab coat's gonna be a breeze^^ The mask is what I'm worried about, I might have to sow it myself for proper results.
The mask shouldn't be too tough. Pretty much just a standard balaclava. The only distinguishing part of it would be the slightly styled hole shape. If you have a look for some military surplus stores (either street or online) you should be able to find a decent range of balaclavas for quite cheep. I can find a load in my area for between £2 and £10. I'm sure Norway can't be too different on that.
In a last ditch scenario there is of course the t-shirt ninja techique, which can actually look pretty good, though it's not quite accurate to Dr McNinja.