I was just wondering if anyone knows if I can get new eyecups for my Nikon monarch binos. The plastic piece that threads onto the binoculars is cracked and won't stay tight. My question is can I buy or have free replacements sent to me without sending in my binos? Can eyecups be purchased from another company separately? The reason I ask this is because I took the eye cups off my brothers vortex vipers and put on my nikons and they work awesome! The part that threads on is a lot thicker and might even be metal on the vortex. i would gladly pay for something that would prevent any future problems.