The original CF150R ball joints are completely discontinued. These replacements have a narrow angle taper at the attachment to the spindle. It's recommended to countersink the holes of your spindles for installation to fit the taper.
Even when the original joints were available from Tomberlin, they were $43 a piece. If you need to invest in a countersink, these joints still come out to be much less expensive when you need to replace a set.