If you'd ever dealt with our company, you'd know that's not true. We turn away work quite frequently, but never because it's too much trouble to keep a customer happy.
Sticks, sorry to hear of your deflating experience, genuinely. It's gut wrenching when you've put so much faith in a product, to then have them disregard your efforts. That said, I think it's worthwhile contacting Mapex directly. Mapex may well have placed the decision in the hands of their distributor. Sales rep's are notoriously poor at delivering bad news, & typically blame another party for the decision. It gives them an easy ride, rather than taking it on the chin & having to justify themselves. I'm not saying that is the case, but it's worth a shot.
If all else fails, it's not too difficult for a good custom builder to replicate the finish with a similar shell. The one saving aspect to that route, is that the specific shell construction for an 8" tom is far less critical than it is for larger toms with a more distinct voice. If you wanted to be really picky, there are builders who will bespoke manufacture a ply shell.
If it were me, I'd forget the idea & just enjoy your kit as it is. It's not as if you're stuck for choice of kits with 8" toms.