Heres where i bought mine from, I know him from when i had renault 5's He dous injection & managment systems for them, but also a main dealer for AEM, ZEITRONIX, etc & dous all accesories.
http://www.efi-parts.co.uk/
I havent got a clue where to start yet nomad. & i wont be fitting it untill the car has been sprayed, so it will be about a month untill i do a how to!
! thing i have thought of tho, is that if the lamba needs to be around 2 - 3 feet from turbo, maybe routing the lamba wire under the drivers seat & using the HOT DOG hole for cat, to route the lamba through?