Changing from 5x4 to 5x4.5

I am currently running an 8-3/4 rearend...I am leaning toward the redrill of the axels as then I could afford a rear disc upgrade on the new bolt pattern, but am also curious if there are any shaft replacement options outside of custom shafts through someone like Moser? I have a modest budget, but have other parts that I want to go with the best on.