I agree with sprung...I think a good moistuizer is gonna have a water base...otherwise you'll have excessive build up issues...
anyhoo, I like Giovanni Direct on my ends. I just discovered this 3 weeks ago. I had been putting on my NG and the length but I didn't concentrate it on the ends. So I tried Giovanni on the ends followed with jojoba oil to seal and I haven't looked back! It's been great...
You may also consider some kind of distilled water/glycerine mix...or even glycerine with rosemary eo...
HTH