IMO, I think the problem you're having is not really related to you cheekbones directly. Even if you augmented the cheekbones at a later time; you'll still have that dip-in that you're complaining from. What you have is your alveolar process was expanded beyond your maxillary width. That is to say, the area that is right next to the nose is slightly narrower than the arch itself, creating that discrepancy you're complaing from.
I think that your problem might be solved by having one of those new, small, triangular paranasal implants that are placed right in that dip-in to fill it out. Don't do dermal fillers, it'll just create a superficial bulge.
