I got sent a Bsa Cadet the other day and it is lovely to plink with. The wire diameter only seems to be around 2.7mm rather than 3.
I've had a look through the springs thread on here but cannot seem to find one to match.
I have used cut down Meteor spring in the past but would love to know of a 2.7mm ish one that will fit the piston and also the guide.

Normal cadets are supposed to be 19.7 mm OD
13.5 ID
3mm wire thickness
185mm long
28 coils

Thanks