is there a storm ball that is similar to Storm Iq Tour Fusion

I think the IQ Tour 30 is also a possibility, because it has the same core and is a pearl version of the same coverstock on the Fusion.

Using maybe a slightly stronger drilling with a lightly modified surface should be able to bring it very close to the Fusion.

I just realized that the solid version of the IQ Tour is also still available. Polishing that up with a slightly modified drilling from your Fusion will also bring close to the Fusion.

To me, the Fusion was way more flippy than a polished Tour. 

That's why I said, in the case of both pearl and solid,  that both a drilling and a surface modification "should" bring them close to a Fusion.

The IQ Tour 30 Pearl (the blackish one) is supposed to be stronger overall than the original IQ Tour Pearl (the gold one).