CV style driveshaft blowing up is all part of lifting a ZJ, and they grenade even faster if you take it on the trails. You can find a used one pretty cheap at a u-pull it, so I'm sure if you drive you can locate something to patch it up for now relatively cheap. That stated, you need to start looking for a front yoke and a U-joint front driveshaft if you're going to keep wheeling.
If you're paying your builder make sure they're including and installing the yoke too. Unfortunately, the yoke for the CV and yoke for the U-joints are different, so you absolutely need to change the one on your front axle. There's lots of write-ups on this and it's a relatively simple procedure to DIY. As for having it re-built, for that price I'd spend the extra $25 and just get a Tom Woods shaft.... then install the yoke and DS myself. You will need to find the yoke first to see what the final length will be for your driveshaft though.
WARNING: Lo barato sale caro (Cheap things often lead to more expense)