I need some Datsun material science advice. Last years thread talks about fabricating insulators to replace the old rubber for the car's plumbing. http://www.classiczcars.com/forums/showthread.php?t=29518&highlight=brake+line+rubber What is a good source of rubber for this task? Something like this... http://www.amazon.com/Superior-18-1701-Rubber-Spring-Booster/dp/B00029K20M/ref=pd_sbs_auto_3 or maybe this http://www.jewelrysupply.com/index.php?main_page=product_info&products_id=20399