As there are no machines that give you items at random, this isn't a true gacha. Instead, individual items are available up for sale on stands or from displays. The event has been going on for a while, so many of the items originally up for grabs are gone. Besides the items at the gacha area, one can also get Firestorm jackets on Marketplace.
If anyone wants to help out by donating items, contact Klo Fella inworld. How long the fundraiser will be going on hasn't been stated.