Make numerous quick and sustained studies of the design you want to replicate and it will supplement and inform your imagination so long as you do both
Eventually the imagination becomes a good intermediary between visual information and your own representation, but it's important never to bias yourself in one direction
I think this works for pretty much anything you want to do - if you like a certain artist then study their art, like I imagine you might like Gerald Scarfe's work or at least appreciate it for having an undeniably adept sense of volume and composition and so you can study that or study any image really and that might help you learn form / volume whatever