I would target salespeople within these organizations.
1. You use software like LinkedIn Sales Navigator or Apollo to target "sales managers", irrespective of the industry.
2. You use a sequencing tool like Smartlead or Instantly to automate emails.
3. You blast a lot of these emails, until you see one industry responding better than another.
4. You double down on it.
In sales, no need to assume. Test & iterate. Nobody has the answer for you... only the market will tell you
PS: That being said, I wouldn't contact E-commerces for such a tool. Best to target B2B organizations from my experience