In loving memory, Sarah's family and all of us here at MechWarrior Online kindly ask that you consider donating to your local Cancer Society or visit Cancer.ca to donate today.
This is their official response, taken directly from the OP. There is no need for further response from them.
For my part, I don't think adding a 'Mech into this game for anyone is a good idea. There may be some looming legal issues as well. Donating directly to the Cancer Society or via the link they gave is the best idea.