Copper-Beryllium Spring question

[AMDTrucking]

To improve Maraxus, Venus and Panzer switches
I need a few Copper-Beryllium, silver coted compression springs 12.5 mm outside diameter (1/2 inch), 15 mm long 5 – 6 coils. The wire diameter should be equivalent to 0.6 – 0.7 mm Steel Spring pressure vice.
Does anyone know where to get it?
Thanks.
Mike.