You have so many partners, how about making an appeal where Mumsnetters donate to either Red Cross or MSF, together with some of your partners, and a whooping 20 random mumsnetters are in with a chance of winning goodies in a draw. From MN books and mugs and t shirts, to a Gousto family box, to £50 White company/John Lewis/ whatever voucher, etc.
A great incentive to donate, and publicity for your partners that donate stuff.
A goal of raising £3k? or More?