Pilkington still do DAF screens. The long and short of it is that the Queenborough factory does the classic stuff and if they have the tooling they can make it at some point as they do batches. If they don't have the tooling they can make one from scratch, but be prepared to part with the thick end of £2k.

Pilkington does windscreens for 300-series, I bought one at last year.

For the Finnish members, this place also does custom windscreens for any vehicle. http://www.kuttilanautolasi.syhi.fi/

-Marko