Stock at Vendor for 2 Vendors

Here is my example:

We supply labels for a portion to 2 antithetic vendors. Sometimes we usage Vendor A and sometimes Vendor B. 

Right present Vendor A has 3,000 labels and Vendor B has 500. There is an unfastened bid for Vendor B for 1,000 for the parts. No acquisition requisition comes up to bargain these labels due to the fact that our strategy shows that we person capable stock, but vendor B does not person capable to screen their order. 

My question is however bash we get a acquisition requisition to amusement up per vendor? Or is determination a amended mode to bash this? 

Thank you!