In reply to Big Mountain Man:
Hey Big Mountain Man,
I don't know of any companies that do this per se. Getting sponsorship from commercial organisations is hard these days, unless your very media savvy - which you might be! I suppose it depends on how remarkable your expedition is. Cotswold seem to be pretty helpful for bits and pieces.
There are sources of grant funding, which I imagine you know about, MEF, BMC/MCofS, the RGS, The Alpine Club (membership of which is not difficult - they're a friendly bunch). Also, have a look at this:
http://thenextchallenge.org/resources/sponsorship/ ......some good info.
Have a good trip, Rich.