ATU springs for R100GSPD

Hi all. Am looking for new atu springs for my 1995 R100GS PD in uk. Mine are slightly weak ie very slight pinking at 2500 when gassing it. Ones I have found seem to be too small and too short (20% short).

I took the atu apart and removed all dried up grease and lubed it up afresh which smoothed out the low revs delivery a ton but this wont cure old springs of course.

Hope you can help.

Cheers

Cris