It's possible that you have your info misconstrued.
You receive a 1099 from your employer when you are the contractor.
You receive the 1099 as a statement of your income for the year from that particular employer. Vendors that you purchase mtrls. from do not send out 1099s to those that purchase from them.
You do want to keep track of the cost of mtrls. purchased because those are tax deductible. You can ask for a statement from those suppliers so you will have a year-end total of mtrls. purchased.
However, you are required to pay the sales tax on your work once it is sold. Do you collect the proper sales tax? You also pay income tax on the money received from the buyer, minus the cost of mtrls.