Neutral bushing with gasket

We want to procure,
4 nos. HV neutral bushing with gasket , rated volts.15kv rated current 800 a bil-110kvp
2nos lv bushings with gasket, rated voltage 15kv, rated current 6500 amp, impuls test 1.2/50u sec.110kv
drawings of both above noted bushings are available with us.