As someone who's already sold to that fashion company who makes the decision. Just go and see what product their selling, then ask the product companies vp of sales or CEO if you can get 10 minutes for advice on your business.
As for intro, get advice. Ask for advice, get intro.
This question can be difficult to answer specifically, without knowing the product you are selling to fashion companies, however here is a good starting point.
Once you understand who your product is targeting within the organization, or who you are selling to, go to Linkedin to and search for the people in that department. Start at the top to identify 5 people that you can reach out to. Once you have their names, there are several techniques to locate contact information, with the contact info you can begin the 3 T's of communications, Targeted, Timed and Topical.
Targeted means that you are direct in why you are reaching out, to the point.
Timed means that you are reaching out in a coordinated manner until you get a response. So a call and email on Day 1 then again Day 3, 5, 7 and 10. This can be done in many different combinations, but I like a series of 10 communications(emails and calls) over 10 days that progress in information and call to actions in each contact.
Lastly, Topical means to make it relevant to the person you are speaking to. Use the information you can find online about the person, or their business/industry and play to their interest.
I hope this helps and would be glad to discuss in more detail in a call. Take care and good luck!