There are loads of 1989 episodes on YouTube and MySpace. Of course they don't consist of every episode made in 1989, but there are loads compared to 1986, where there is only very few. Wouldn't mind if there are loads of episodes from 1986, that would be something I would love to see !!
There are a handful of late August/early September 1986 (+ the full end of year special) Chart Shows on Bens myspace page amongst his 113 videos.
The three 1986 episodes I found there (22 August, 5th Sept & 12th Sept 1986) are each split into 2 parts.
The 1986 special is somewhere in there in its entirety.
Worth a good perusing if you have the time and you don't need to log in !