new era makes some roll bars for the savage, i dunno what models you have but heres a link to a couple, they have others, just click HPI on the top links of their site. maybe give you some ideas
http://www.neweramodels.com/item.cgi...n&part_id=2510
http://www.neweramodels.com/item.cgi...n&part_id=3139
http://www.neweramodels.com/item.cgi...n&part_id=2994