Exporting custom posts from WordPress

I couldn’t export from WordPress to Ghost any custom posts. Is that the situation and is there any workarounds?

Custom posts (knowledge base, podcasts, reviews etc) are really common today. It is possible those are really hard to import, but it is matter of pure math: 2000 post and it takes about two minutes to copy manually one; it is two weeks job @ 4 hour a day.

That makes moving from WordPress to Ghost too expensive.

So — I would really like to hear how others have solve out this, because I can’t be the first one ;)