Yeah, you can get it replaced as long as you still have the old one. You did keep it, right? They don't want people buying the necks for
custom guitars, so they require returning the old one. It likely will take a long time, and won't be cheap ... but that's no suprise with Ibanez. You may have to go through an authorized dealer or repair facility.
The other option is to find one on one of those auction sites. There's usually somebody out there who has destroyed the body or is just parting it out.