LBP axles

I recently purchased an A-body 8 3/4 rear. I want the large bolt pattern axles (LBP). Is it easier to get the axles redrilled to the 5x4.5 or just buy new ones? If I buy new ones what do I need w/it? New Drums right? Whats the cost of the new set up w/the drums? Where do I get it? Sorry for all the questions I'm still a Rookie!

Jason