CV boot question

For over 2 yrs I’ve been running a Super ATV 3" bracket lift with zero issues. Axles are holding up great. However, I’ve recently been experiencing CV boots that are splitting. It’s the exact same CV joint every time. The rear-left, inner boot. Epi boots just don’t have enough flex/accordion to them. I know all the big axle companies have lots of flex to their boots, but the diameter of those boots are too large for our stock axles. Who knows of a CV boot that will fit stock axles with plenty of flexing ability? Thanks!