Reusing ISS Alpha designs

When ISS Alpha has been built as much as it is going to be built, there
may arise a discussion as to what the "next big thing" in human
spaceflight should be for NASA. The public seems enthralled with Mars,
so probably that's what's going to happen whether we at ssi_list like it
or not. But I was speculating as to what else might be done in the
post-ISS period.

One concept I thought about was attempting to reuse and/or build upon ISS
Alpha components. After all, a lot of money was spent developing ISS, and
so it is appropos that we should consider whether or not any of that
pricey hardware could readily be adapted to other purposes.

One possibility I thought about was to build another space station in
Earth orbit from modified ISS components, and then send it to a NEO with
minimal crew. Go to the NEO, plant a flag, take pictures, gather some
rocks, come home. Clearly, we have the know-how to build space stations
in earth orbit, and we also know how to keep people alive for extended
periods in such space stations. Could we send an ISS derivative from
here to a NEO and back again?

For such a trip one would need to develop a propulsion module to lift the
ISS derivative out of LEO and send it to the NEO. This is a major piece
of new hardware that would need to be built. And one would also need to
develop a storm shelter module in which the crew could hide during a
coronal mass ejection. And one would need to consider how to propel the
package back from the NEO to Earth orbit. So there's a lot that wouldn't
be part of the base ISS package. But, there's sure a lot of engineering
that went into ISS; I would hope we'ed at least entertain the idea of
reusing or adapting that to other uses.

Perhaps ISS is so specialized to its current task that attempting to adapt
it for travel to a NEO would be equivalent to adapting a hammer to be a
toothbrush (that would be difficult). What do you think? Doable, or
impossible?

Ron