Thanks Compress Ignite and Sixto for your rapid responses.

Whew! Ten weeks is a bit of time... I found this listed as an "injection pump timer" online from pro street online. It says it's for the 1985 190D, but the part # is different from what World Impex lists on their site. Is this the correct fit for the 85 190D?

Injection Pump Timer - Pro Street Replacement Parts

I should have mentioned in my original post that when I removed the old vac pump, several pieces of metal fell out to greet me. Upon examination of the old vac pump, I find no bearings and discovered that one of the two metal rings that would house the bearings has been sheared completely off. NOTE: the metal pieces that fell out were not bearings, but part of the housing unit. bearings are gone...?

See attached images: I am trying to attach images but no luck. It asks for a URL??? Sorry, I'm new to this internet thing, sort of.

My fear is that the bearings, and perhaps other metal shavings from the housing, have wandered into the engine compartment despite the presence of the infamous "basket" that sits between the vac pump and the timing chain housing. Would this spell impending doom? Where else could the bearings have gone? I am certain that they did not just vanish into thin air as this is a vacuum pump and there would be no air present...Ha Ha.

Also:
The links to GSXR's site is a gem... However, I am not finding anything relating to the "timer ramp"/"stroke curve" replacement. There is a Pierburg pdf that shows how to tell if the timer ramp is damaged and in need of replacement under the mb/60x section, but nothing detailing the replacement of the timer ramp/stroke curve... or am I totally missing something there?

Thanks again, digby