Got a good, no great deal on a 64" Obrien Siege for my 12 yr old. He'sw moving up from a 61" HO Judge. Here's my problem, the new ski came without an adjustable fin and no cheater wing or even the ability to mount a cheater wing. Where is the best place to get a differnet fin set up for this ski with out it costing as much as the ski?

Schnit's wants 130.00 for just a fin, I need to do better than that, especially for a 12 yr old.