Definitely sounds like the panhard rod bushes. Buy good quality bushes and tighten the bolts with a big, **** off, breaker bar. They have to be extraordinarily tight.
I have meego, but it was 11 years ago, so even if I could remember what I paid it would be right out of date. I do remember having to buy 'blind' pop rivets. I think that's what they were called. They have sealed heads, so water doesn't leak in...