Afraid they are very hard to get hold of especially online.

I think they are more an update of the original rev1+2 EWD's.

I tried to get hold of them for when I was putting my 2GR into a Rev4 n/a shell but had no luck.

You may be able to buy the update from Toyota supplement no EWD149F

I used these:
http://www.cannell.co.uk/Workshop_Manua ... AGRAMS.PDF

It is for a rev1 and for guidance only but if you're reasonably savvy with electrics it's close.

It was invaluable for my swap anyway with 90% the same as the rev4 stuff.

Lee