I did reply before but it seems it vanished somewhere in the net.
I'm not so sure a 165mm lens will be useful, since the 120mm lens for itself uses a fairy long extended board and using it would make the first lens barely focus at infinity. A longer board could be troubleful for inducing mechanical vignetting.
Maybe we are looking for something quite unusual, I mean a tele-wide-angle-lens.
Have you ever heard about it?