You never know what Tested Spring Co have under the bench , especially if you have yet to make the thing . Find them in out Suppliers section .
One also finds very stiff springs in power presses , tho' of smaller dimension . So there should be plenty of these around the Midlands . They all seem to be colour coded . I did find a load of these on Google , but cannot remember where . Obviously check on Ebay , you never know what is being sold off .
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