There is a place in Basel called 'Das Haus mit 1001 Bastelideen' - PRESSER AG. It's at 24 Gerbergasslein.

You can see it from Gerbergass, which is the pedestrian street that the Body Shop and the shoe shops are on that runs from Barfusserplatz towards Marktplatz. You can see the shop looking up one of the streets. At the moment there is a guy selling roasted chestnuts in front of the street. I'm sure google maps will have it!

They are a smallish shop but packed full of stuff. You may find what you are looking for there.