Major Ledfoot I had to get a new bottom box from gcp.se since the clips holders on the box all broke, and I couldn't find a good one locally for less. The bottom box bit is p/n 3517062 and it about 1002 SEK plus shipping. It's worth noting that the diesel versions also use the same bottom box, but with a different top cover. The top cover part for a turbo car is p/n 1257781, but fortunately @paul0075 gave me one with an AMM I bought from him ages ago.
jamesinc I replaced the clips on my one when I had the 740T. I bought Protex spring claw toggle latches online somewhere and pop riveted them in place. I used a slightly longer latch so I could mount it below where the original plastic mount points were.
Major Ledfoot @cr80442 has one up for grabs - the 740T and 940T boxes are the same. https://ozvolvo.org/discussion/7305/740-turbo-parts-qld#latest