Up until about fifteen years ago, there were a number of these Crossley's piled up in a scrapyard at Molesworth. All in a similar, or worse condition than yours. Unfortunately, the yard has since been cleared, but I did recover a couple of engines. At the time I was looking for something to power my WW1 AEC, and these seemed to be the most suitable, being two blocks of two cylinders. I have one engine installed and running, and I have some spare parts. If you know what you need I may be able to help.