CHEAPest way to convert rear axle bolt pattern to big bolt pattern???

Because most folks would rather not use wheel adapters if there are better options.

i understand there are better options but he asked about the cheapest way to get the larger pattern and ballistic fabrication sells some tough billet ones very reasobably priced and if they dont have the one you need im sure they wouldnt hesitate to make it to your specifications for a few dollars more since they do custom work all the time