were can u buy a pot for melting lead in

If you want to spend a few quid these are the business - http://www.monumenthandtools.co.uk/mon1086m-10in-250mm-lead-melting-pot.html

Otherwise any quality aluminium or stainless pan will see you ok, no plastic handles!! Car boot sales or charity shops are worth a visit.

Check here for more info - http://www.planetseafishing.com/tutorials/read/how-to-make-your-own-leads-safely/