So I have no idea if I am calling the "adapter" the correct thing here but anyone have any idea where I can purchase these:

I need to purchase quite a few around 200-250. They only needed for a project for next year so if I need to import from somewhere there is still time.
They can be the single USB port too and also plain white so if anyone knows where I can get them from please let me know.
Thanks,

I need to purchase quite a few around 200-250. They only needed for a project for next year so if I need to import from somewhere there is still time.
They can be the single USB port too and also plain white so if anyone knows where I can get them from please let me know.
Thanks,