So the situation is as the title says. You bought goods from a company that’s now being closed and they haven’t issued an invoice for the goods as of yet regardless of the repeated requests from your part.

The first question you ought to ask yourself is the reason why the company is being winded up. Is it just an inability to pay invoices and the creditors asking for insolvency or is it the owners wanting to close down business with the company otherwise able to pay its debts. 

If the first situation is happening and the creditors are coming after the company’s assets be sure you’ve got the amount you’ll possibly owe for the goods accrued into your liabilities. If the company’s management didn’t issue an invoice for whatever reason, be sure of the creditors to do it for them. They want their money for sure.

However, if the owners are just closing the company and it’s more probable that they will not be issuing this invoice (which, to be honest, is a rare occasion) and you can account for those goods as with 0 cost to you. You just take them to your detailed inventory ledger with their cost price as zero.