If you are after small amounts talk to your local friendly miniature manafacturer metal is currently running at around £18-£20 +vat per kilo so even with postage you will save at least £10.
We use MCP
Mining & Chemical Products Ltd
1-4 Nielson Road
Finedon Road Industrial Estate
Wellingborough,
Northants, NN8 4PE
England
Phone: +44 (0)1933 225766
Fax: +44 (0)1933 227814
info@mcp-group.co.uk
Hope this helps
Ben