Hi Tony, here's a link to the Aussie toucam and parts retail specialist;
http://www.telescopes-astronomy.com....am_philips.htm
They may be able to help with the sourcing the sensor,
And also a link for the exposure mods- pictures and steps;
http://www.home.zonnet.nl/m.m.j.meij...Y/spc900nc.htm
If it is of any use.