How would I go about printing old receipts without posting again?

Good morning,

I recently created a receipt under Purchase Orders. I however forgot to print it, or lost the paper. I would like to print it again, however I am told I can not post it again. Or it would be counted twice. I tried going into Purchase Forms and checking there, but the receipt comes up with "conditions" under vendor number and doesnt have Unit Costs etc. How would I do this?