mike....I think the bushings from rear fox shocks from 2010 and up nytro mtx has the right ID and have a wide bushing and a narrower one for different widths. let me know the ID and width you require and I will check my shop to see I can find some to measure and locate part numbers. I ordered some when I installed a fox float shock into my nytro xtx skid a couple years ago, I used the stock rear shock bushing and the fit was perfect.....
you could also just get a bigger bushing made up for your install.