Try retromodelisme, the biggest resource of old Kyosho and Schumacher manuals.
cat 2000
http://www.retromodelisme.com/manuel...chumacher.html
cat 2000 EC
http://http://www.retromodelisme.com/manuels_pages/66/cat-2000-ec-schumacher.html
Most old Schumacher manuals are also in the manuals section of Tamiyaclub.