we have Conversion Kits
THERMOPILE, 36" 2 LEAD, 250-750 MV, ROBERTSHAW 1950-53B NRE # 055904
Conversion Kit, Safety Valve, Nat Gas, 3.5" Robertshaw , NRE # 030664
Thermopile, 60" , 750 MV , Robert Shaw 1950-003, , NRE # 055901