Harry, did you ever get an answer to this question? I’m now in the same situation. However, I got farther than you did. I can get it to 23.98 but I’m very unhappy with the results.
Here’s what I did. Using FCP7 I logged and transferred to Pro Res – comes in at 29.98 interlaced, go to Tools/Reverse telecine Cinema Tools and it converts it to 23.98. Unfortunately, for some massively confusing reason, it also created duplicate frames and has terrible artifacts. I need much better than that, so, I’m wondering if you ever developed a solution to this?
Cheers.