N & L machinery (BC) has for over 45 Years been an Importer/Wholesaler of HeavyEquipment as well as related Replacement Parts and Components such as Engine Parts including Diesel Injectors. We currently have a customer who has requested Pricing for resale on the Following Detroit Diesel Injectors:Detroit Part # R5228900 Injector for Engine Model N65Detroit Part # R5228760 Injector for Engine Model N60Detroit Part # R5228763 Injector for Engine Model N40Detroit Part # R5228773 Injector for Engine Model N45Detroit Part # R5228783 Injector for Engine Model N50Detroit Part # R5228785 Injector for Engine Model N55 Generally these Injectors are Sold and Replaced in Sets of 4 or 6 or 8 Pcs. Please advise how you generally Package these in Sets or Supply in Sets. Please also advise Best Possible Pricing for Resale, Current Availability, as well as Per Unit Weights