How to create a Sales BOM for DBM orders?

Dear All,

There is an accessory which we currently buy as 4 different items from our OEM. But when selling, we need to invoice it as one part with a common cost.

I know that a Sales BOM is ideal but can it be used for DBM orders as well? If yes, please let me know.

Im open to suggestions as well.

Thanks,

Savindi