How do I submit a supplier enquiry proffesionaly?

It sounds like you want to be a wholesale distributor of a manufacturer's product. It is not easy starting in this type business as most manufactures will want to deal through high volume established companies. You would be best served if you worked in the sales department of one of the big companies until you have established a good clientele list. Then you could start your own company by offering "different"products to those clients.