I was actually thinking the other day that we don't have nice tapes here in shops.. unless I didn't look properly. I'm so sorry Tiimari closed, they had lots of stuff there, likely I would have found nice things. I usually go to Prisma for shopping, so I check the stationery there. They do have nice stuff, of course, but not everything I want.
It's a shame that Tiimari closed. I loved it as well. Here we can find washi tape in office supply stores and craft stores. . I've also bought some online. Have you tried Sinelli or Sinooperi?
Not only haven't I tried, but I haven't heard of them.. :D I know there is a craft shop in Jumbo Shopping Center in Vantaa, but never went in. And of course I haven't tried the bookstores, they might have nice things in the office supply department. I did, however, find some nice stuff in the "cheap shop", Saiturin Porssi. I don't use a lot of tape & stickers, but I'm working on vauvakirja now, so some things come in handy.