Saab 9-3 2.2diesel 85kW problem

hallo, i have aproblem with my car – it has very strong vibrations even after changing the all engine/gearbox mounts, both – chains (timing etc). during the drive – it is OK, but the performance is somehow limited (not more than 150kmh/h) – but quiet.
on neutral – very vibrating.

many thanks for comments! btw, is there any good source for injectors please? i have seen http://webshop.saabparts.com/ – only injectors for 2001 versions, but not for my car – which is from 1998.

thanks!