Pims84 I don't know if it still exists but at some supermarkets you could get some cash money (I think only like 200 euro) when you paid for groceries.
Alternatively you can use a service like Western Union to wire cash money and pay with iDeal. However, it will cost you money though.
I don't want to patronize, but 3k cash on a short notice sounds a bit fishy. Beware of scams!