If the bilstiens have floating type alloy spring seats you could always get circlip groves cut lower in the shock body and just have it slammed with the factory springs?
progressive spings are a good idea as they will be soft unless fully laden.
i believe a lot of euros have very long springs with thick wire diameter but tons of coils. more coils is softer but thicker wire is firmer.
autolign can help the boys in the workshop know their shit i worked there about a year ago.
Those are just standard man.
you can get Xenon gas ones from hella which are a bit better or the Narva Plus 50 range is pretty good.
You can also get HID kits to wire into an H4 setup. pretty easy and real cheap. just not vtnz legal.
Position coming up at my work in penrose.
Basic parts supply to workshops/retail. Aftermarket parts.
If youre an experienced parts guy or mechanically knowledgable and dont drive a cefiro on chromes then get in touch and ill try tee you up.
Dylan