Where can I order controlled-origin bacterial mix sample?

Question

[bulovic.ana]

Hi,

For purposes of assessing my approach to species identification from a metagenomic sample, I wish to order sequencing of a controlled-origin bacterial/viral mix sample. The ideal version would be for me to list all the bacteria I wish in the sample, and their mutual ratios.

Does anyone know where I could order something like this?

Thanks,

AB