[gta02-core] Uncertain news about the parts

[Werner Almesberger]

Sean has warned me that there are problems with the inventory at the
factory, that "Numbers were always changing" and that he's "still not
sure what's left now."

This may mean that some of the parts we've been promised have become
unavailable, but Sean doesn't seem to have more specific information
at the moment. (Some parts are easy to replace, some we don't even
need, but others would be expensive and very hard for us to source.)

Sean promised to keep me posted on what he finds out.

- Werner