Is it ok to use a 100 amp panel with a main switch in it as a branch box? I have a 100 amp breaker in the main panel and am using 2/0 wire running to the branch box.

hi guys, i am in need of 1 new / used/ nos bus bar or complete breaker box to replace mine. its a cooper industries crouse hinds model JA11 OAS model-f surface mount meter socket 100 amp. any body any info very appreciated. scott 561-441-7775 [email protected]