Hi Shall
   There's loads of great Early music on the Net in MIDI format. To convert it into score I use a smashing Shareware program called Melody Assistant available Here. The fully functional version (£15) will import and export MIDI, ABC, and many other formats.
It's a powerful program and very intuitive (I learnt to use my copy without a manual). The printed score is very readable and attractive.

All the best PP.