G Day Onder,
I don't have an o/e tool kit but there's a piccie of it in the parts book- though it won't show you what's plated/painted, but it obviously will show what the contents are.
Someone is making new tool kits- I think in the US-I don't remember where I saw it but it was this year. I'm pretty sure I found it mentioned on a thread here- may be just try searching for tools, toolkit, etc? I reckon there was a link that took you to the site of whoever makes it and there were piccies. I was quite interested myself til I saw the price- once I converted it into £ I lost interest- that's what autojumbles are for!
Sorry I can't be more precise but it is out there! If you find a photo of the factory tool tray I'd be very interested. It's in the parts book (I have mk 3 850) but doesn't show how it's attached to frame. I have a Corbin seat and its mounting bracket sits right where I think the tool tray goes... I did post here about it, asking for photos but not nil response.
Good luck mate!
crusadersports