This is what I've used for several years on my SP-10:
Custom Design Inert Turntable Matt
http://www.analogueseduction.net/turntable-mats/custom-design-inert-turntable-matt-for-suspended-turntables-.html
You'll need the stainless steel version.
Custom Design Inert Turntable Matt
http://www.analogueseduction.net/turntable-mats/custom-design-inert-turntable-matt-for-suspended-turntables-.html
You'll need the stainless steel version.

