I would lean towards the Pink/Purple Jewel. Cores are the same and the R.G. and Diff are nearly identical. In terms of cover, the Jewel has a stronger cover vs. the Lunatic and is a pearl vs. solid. Overall, I would have to say the Jewel is your replacement ball. I have had a Lunatic and have throw a Jewel and for me the Lunatic was a little rollier/stronger in the midlane and a predictable arc off of the dry. The Jewel went a a little bit longer, but was stronger off of the dry. I think knocking the shine off of the cover of the Jewel would definitely make it a similar ball shape as the Lunatic. I would imagine others on here will be able to comment on the similarities of these 2. Hope this helps you out.

My first inclination was to polish up a Sure Thing, but the Jewel is also a candidate depending on which you'd like to manipulate.

The ST has a lower RG but the coverstock strength is closer; so you'd need polish and higher RG drilling. It is also a solid/pearl combo while the Lunatic was all solid, I believe,

The Jewel is skid/flip pearl so you'd need to sand the cover duller and probably put a hand polish on it to insure an earlier "lane bite". Probably need a larger VAL angle to reduce the designed-in flippiness of the basic ball.

So either could work; depends more on how good your driller is with drillings and how good you are with surface adjustments.

You know, I wonder if The Wisdom isn't a better compromise than the other two. But I think it's weaker than the original Lunatic and might need a pretty strong drilling, compared to the drilling on your Lunatic.