I am looking for suppliers of threaded flange inserts preferably in bronze or brass. They would be for urns and needed in 2 varieties. The first would be for a bottom fill where the threaded flange would be insert/mounted to the bottom of the piece and then a cap screwed into it to seal. The second would be for a lidded urn where I would need a male and female threaded flange. Any suggestions would be greatly appreciated.