It might be good to look into a business line of credit. These short-term loans give you the chance to draw on your credit line when you need it and repay it in installments between 6 – 12 months. Two of our preferred partners are Kabbage and OnDeck, which you can read more about here.
You might also be able to float your inventory costs with a credit card by making minimum payments until you receive cash from your customer. You can check out our list of best business credit cards for more info.
These might be your best two short-term options for floating inventory with a ~120 day lead time.
Hope this helps.