90% of the way tonally is a lot more authentic than 10% of the way. So much that Telenator even sold Alnico versions, which Fender could have done. I've converted WRHB's to magnetic poles before, and it completely changes the tone. Just because a pickup from a relatively small builder retails at $420, doesn't mean it would cost Fender much. With Fender the difference in parts would probably be under $10 per pickup, not $420. How do I know? Because I've modified current Fender WRHB's and know the cost of the difference in parts. So it's more a case of Fender not thinking that they'll get a significant increase in sales from a fairly small cost. That might not matter much to someone building dozens of guitars a year, but when selling on Fender's scale, consistently finds ways to save $20 per guitar, they get to add zeros to the end of their profits.