We use sourcebirds.com for that, it’s sort of an agency/network of sourcing agents who helps with everything from finding a manufacturer, inspection or developing a custom product etc.

But you can also try to use fiverr or up work, it’s just a bit difficult to find someone who actually knows their stuff/knows about safety regulations/certifications etc.

Anyway I’d recommend to reach out to a few different companies/people and see who is the best fit for you