My engine lid is unsupported! The fasteners that hold the rollers on have decided they've had enough of life in the dark and made their way somewhere else. I can't find these on any of the normal suppliers parts diagrams - can anyone point me to where I should be looking or tell me what they are if they're something standard?

At the other end of the arm - where it fastens to the lid itself - I've just used a screw and a washer tightened to a point where it didn't bind. I suspect this isn't OG...what should this end look like?
When I restored the bus (a few years ago) this was one of the bits that I sort of cobbled together, which is probably come back to bite me. Some of the parts supplier diagrams show a sliding block - I can't remember one of these - was it all models (mine's a '73, if that helps.)
Lastly, is there a decent diagram showing how the thing should be put together? Everything I can find in the manuals or online looks like it was taken from across the other side of the street.
Cheers,
Simon