Michael,
George has been working with me to get my pump rebuilt. He sent a kit of rebuild parts, including the brushes and bearings and all of the seals and replacement cheese-head screws to replace the ones you will probably damage when you remove them from the pump. I would highly recommend you seek his advice and direction on setting the pump for long term storage.
In the meantime, and I am going out on a limb here, but why not use a very light oil and spritz it on the moving parts in the pump. I don't know the weight specs, but either a high quality clock or gun oil should do the trick. I have used both, and they will not gunk, in my experience, unless they are exposed to dirt which should not be a problem with a sealed pump.
Best,
g
'64 230sl, fully sorted out...ooops, spoke too soon