For metals and findings there is Cookson’s. Their website is
www.ganoksin.com/resources/detail-cookson_precious_metals-1175.html
H S Walsh
http://www.ganoksin.com/resources/detail-walsh-2095.html
and Thomas Sutton
http://www.ganoksin.com/resources/detail-sutton_tools-2096.html
I think Cookson’s are the only ones who have a new catalogue every
year.
I hope this helps.
Sara Durston
Durston Rolling Mills
Progress House, Hospital Hill
Chesham, Bucks HP5 1PJ. UK
Tel no: + 44 1494 793244
Fax no: + 44 1494 792966