Originally Posted by Lislchen

Hey there!
You don't HAVE to get anything from the supply list, it's just for fun really to give you somekind of guideline of where and what to RP. I'm not sure which shop would sell that but that's alright, you can just RP your character asking in one of the shops, e.g. Slug & Jiggers Apothecary for the potions.
I doubt there really is a shop which sells telescopes for example so you can just assume your character having bought those if you want to.

I hope that answered your question.

~Lisa.