Malossi clutch springs for some of the larger clutches from Malossi.
These are sold for the Delta and Fly clutches for bikes like the Honda PXC 150 and other mid sized scooters. HOWEVER, these are a pretty nice for Derbi Flat Reed clutches, Honda Hobbit clutches, and more!
Springs measure 33.9mm in length and are about 10mm in diameter. So compare those to your original springs and these might be a drop in upgrade for you!
Malossi part number 29 9605