YES! As it has been said several times in replies, it is rebuildable. You can also choose grease able or non greaseable U-joints for the double cardan joint , the front u-joint at the front axle pinion. If you do not have a grease fitting on the slip joint? Make sure that you consider that option, also! Some of those front driveshafts only have one grease fitting, thats on the inner ball of the double cardan joint!
We have Drive Train Industries, here. I don't know who is available in your locale. Any reputable driveline shop should be able to set you up!
GregH