You may want to call a RP supplier in for guidance- try www.daubertcromwell.com. Where I work, we use Volatile corrison inhibitors (VCI) bags, but I don't think the shelf life is 2 years. I would also question why are you store fixtures for two years that's considered a waste where I come from...
Make sure you keep in mind the Voice of customer-VOC. To be interested in purchsing is one thing, a need is another. Do you really need a 5 axis machine? In helping me with new capital projects, I try to clearly define what is needed; then I review and measure my current state; analyse my...