You can order this product here. At the checkout you select 1.Type of Delivery -> Collection and further below 3. Collection location- > Basel. Under 4. Payment chose -> Payment upon collecting. You can then add your mobile number and once the product is in the store, you will get a message, then you can go pick it up and pay in cash.
The supported SIM size is Standard SIM.
PS: Please be aware that it is not possible to name other distributors or retailers that may sell this product according to Digitec community guidelines: digitec.ch/en/Wiki/4490 So you may have to do your own research a little bit. Good luck!