Yes, I love the white Hurst ball, but the Hurst shifters are very pricey :(
In 66-68, The Inland company made shifters with white balls for other cars than Mopar.
I found a white ball initially made for GM cars, but having the good 9/16-18 threading for the Inland shifter, and also the "well" to accomodate the sliding T-lever.
It fits perfectly :)