So I gave my Holga with glass lens (Woca) to a dear friend. Now I wish my remaining Holga had a glass lens too. However, I don't want to spend any money to buy a new Woca camera. That would be silly and wasteful. I have all these 120 and 620 box cameras laying around. Can I just rip the meniscus lens out of one of them and install in the Holga? They are 'fixed focus' so perhaps they won't work? I need something that will have approximately the same focal length as the Woca lens so that the focusing points on the dial will remain the same. Ideas? Thoughts?