I've just installed a set of Eibach springs and Bilstein B8 shocks on my '82 323i S Edition

Would be grateful for any advice about fitting of bump stops on the shock absorbers. I spoke with a rep from Bilstein UK today and he explained that the front shocks have the bump stops inside the tube from factory and therefore not required externally, and only needs the cover fitted is required, which comes with the shock absorber.
My query is about the rear set up, when I removed the Bilstein b4 shock absorbers from the car, they had the stops fitted externally but were beyond use after 22yrs fitted, and the B4s are the same as the stock shocks and required the bump stops.
Now when fitting the B8's, I'm confused whether the rear B8s (part number 24-184618) have the bump stops fitted internally and secondly if they also require a protective cover like the front shocks, as they were supplied with the shock.
There are bump stops available from Bmw and Bilstein for the B6 but there is no info on the compatibility with the B8.
Does any one have any experience or can assist me please?
I would be really grateful for any input.
Have a great day guys!
