So I reiterate my point, you need to change wholesaler Or go direct to manufacturer for the design and get materials via one of your chosen wholesalers.Not really I can handle all that in house. When I did use one from wholesaler he was on planet zog and came up with a scheme that cost 10K not very sellable to my client so I came up with a scheme that cost 1K, kerching client bought!
Either that or be clearer with what you want them to design for you...if you tell them you want a load of high bay LED's then it's gonna cost more than a load of LED lamps with the existing fittings altered.