新西兰采购需求：步枪瞄准镜

I'm interested in the larger lens option for one of your products. However, I noticed that when I go to purchase, it only displays the smaller lens as an option. This has left me a bit confused, as I'm specifically looking for the 50 mm lens. Can you please confirm if you still have the larger lens in stock? If the 50 mm lens is available, I'd appreciate any details regarding pricing and delivery timelines. Additionally, if there are any potential issues with the ordering process, please let me know how I might be able to resolve them. Looking forward to your prompt response so that I can proceed with my order. Thanks!