Calculate closest approach for more than 2 orbits?

[nothke]

I launch, for example.. A resupply vehicle (like the ATV) to my station in Kerbin orbit and put it in a slowly approaching orbit so that I lose as little fuel as possible. So, it would take a few days days for the ships to meet. During that period, I have time to do other stuff with other ships (sure I could timewarp, but that's no multitasking fun xD)... In mechjeb, there is "closest approach in.." but it's only for one or two orbits, just like the KSP already does with those pink arrows. Kerbal alarm clock also doesn't have a lot calculations except the basic KSP ones.

I like how the guys at ESA say after 5th June ATV launch "docking in 13:46 GMT on 15 June 2013!" That's exactly what I need =)