Beauty Salon NAICS code- 812112
Finish Carpentry Contractors (including installing garage doors)- 238350
Can look up specific company information. I would start with the NAICS code and find U.S. companies.
Distribution Channels- Look at the Company 10-K report. The first section of the 10-K has information related to company strategy and usually distribution is listed there. Sometimes the Filings tab with have SEC filings that include the 10-K.
see the MRI tab for access details and reading a MRI report.