I've recently acquired and tidied up a 1930's Oscar Will "Precision" breakbarrel, nice thing with sidelever barrel release. The spring is kinked and needs replacing, I just wondered if anyone can match a common spring ( eg Cadet, small Dianas etc ) to these specs; length 8 1/2 inches/ 230 mm minimum, outside diameter 0.7 inch/18mm
max, wire about 0.1 inch/ 2.7mm. Any suggestions much appreciated.

torrens