Depending on how much $ you want to spend...
First check out the solidworks site under partners, gold partners. This will allow you to review several vendors with integrated solutions.
After that, a simple google or ixquick search with solidworks and erp will show you them and other lower cost...
Here is a site with tons of drivers for 3dconnexion products. Save it to your favorites....
http://66.249.93.104/translate_c?hl=en&u=http://www.treiberupdate.de/treiber/3DCONNEXION.html&prev=/search%3Fq%3Dspaceball%2B3003%2Bwindows%2Bxp%26hl%3Den%26lr%3D%26sa%3DG
TTraser
Engineer (LSD)...