Donations to Philip Goodeve-Docker's fundraising page have exceeded £6, 500 in memory of the adventurer who died during an expedition over the Greenland ice caps.
So far the group, made up of Philip, Roan Hackney and Andy Norman, have reached 162% of their target. Click here to donate through their JustGiving page.
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The teenager's family spoke of their "torment and pain" after serial killer Levi Bellfield finally confessed to her murder.
The fatal collision happened in Hackney, east London, just before midday on Tuesday.
Police are hunting three youths in connection with the incident which happened on January 4 in Romford.