where one can get the base plate?
If you mean for lenses here ya go:

Dark Energy Creations - Powered by Network Solutions.
machine shop, custom machining, manufacturing, engineering, design, 3D modeling, prototype, model making, 3D pdf, motorcycle, automotive, marine, boats, hobby, model airplane, model trains, steampunk, brass, telescope, science, laboratory, go-cart, go cart,
darkenergycreations.com