cjbstar is correct. You don't need the 1099 to file. Hopefully you kept track of all your income and all your expenses. The only thing the 1099 does is give the IRS a way of making sure that people report the income. But all they're looking for is that your reported gross income is at least the sum of all your 1099's. For mystery shoppers, the gross income figure you report will actually be much higher than the total of the 1099's since it would be fairly rare for a shopper to not have at least some companies where they made less than $600.
(I am currently a tax professional, and have been for almost 20 years.)
Time to build a bigger bridge.