Rear leaf spring shackle bushings

I got around to assembling the new rear of my Valiant but noticed the shackle bushings that my Hotchkiss springs came with are a larger diameter than stock and wont fit through the rear spring mount. The old mounts are toast anyways but where would I find new larger rear mounts that I can be certain will fit the larger Hotchkiss bushings before ordering online and finding out it's the same factory size.