Distributor rotor for 3.0 CL

I've got a '99 CL with a 3.0 engine. I was trying to replace the rotor and could not find an aftermarket rotor that was right. The hole for the securing screw was located too high compared to the oe rotor. In other words, I couldn't get the rotor to slide down the shaft far enough to get the securing screw into the threaded hole. Has anyone else had this problem and who makes a correct replacement? Thanks.