Found one online but not sure if it can be downloaded. Brought back memories as I browsed through it. It's for the H model, but except for some performance charts, they're pretty similar to the D model.
This same site has some Snake -10s (AH-!) available too.
You might have to login to the site, but there is no charge as far as I can see.
Quality sucks because it appears to be a scanned copy, but it's readable.