Holy grail indeed!
I suppose it's not surprising that no complete recordings of the ITV broadcast have surfaced around here - if you factor in the perceived irritation of having to fast forward through ad breaks and the (then) high cost of blank tapes, you can see why the majority of recordings would be abridged if not subsequently erased altogether.
I still have in my possession Russ's excellent transfer of an original - albeit ad-free - recording (Russ, thanks again and I promise I'll get the discs back to you ASAP!) There's a bit of material missing from the beginning and end, but the ad break bumpers are intact:
It might be possible to do a reconstruction of sorts, particularly given that some of the ads are on Youtube: http://www.youtube.com/watch?v=neDwj8oTBdM
Presumably we could also piece together some other breaks of a similar vintage, perhaps include some Kenner ads or TV spots for contemporary movies, what do you think?
A couple of final points. First, it seems that there was a screening of a complete tape at this event last year: http://inda80s.cgeu.info/ (scroll to the bottom - that's a DVD cover I made, bizarrely!) I contacted them but to no avail, but perhaps you'll have more luck?
Second, just for nostalgia's sake here's a PDF of the TV Times from that week:
http://www.box.com/s/56169ff8b190cf2dac29
http://www.box.com/s/d294966e7ffb94eb2a32
Enjoy!