Crusader

Hello everyone, I'm having a really hard time finding a good lense for my bucket, and I'm trying to get it finished for a convention that is in two weeks. I already ordered this one here, but had the hardest time trying to get it installed. Ended up ruining it in the end. https://www.amazon.com/gp/product/B00HWFKBJ6/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1 What other lenses have some of y'all used?