I don't know what you did there but if you worked in the office or had any dealings with the people that your company did business with, maybe you could use them as a reference. Also, any supervisors on the floor maybe? Good luck with your new job. Also, I do think that your new employer will take into consideration that you haven't got a lot of references due to the fact that you have stayed with the same company for 16 years. Finding that trait in someone these days is hard to do. Most people don't stay that long. People nowadays change jobs like they change underwear! That is a big plus for you!