BOM Explode in Subcontracting

Hi Friends,

I have following BOMs for same material.

A = B+ C

A = B+ D

A = B + F

I have maintained the same thru alternate BOM. Each alternate BOM is assigned to differnt Vendor (manually outside SAP)

Is it posiible I get different items for each vendor (as per alternate BOM) when making PO with item category as "L" when BOM explodes. Is there any way for doing this.

Regards