From that link I provided:
"The goal of the project is to fully restore the fountain so that many future generations can enjoy the lovely sound of bubbling water in the beautiful setting of Wibaux Park. The restoration will preserve the beautiful marble center fountain and rim, and will include an accessible sidewalk with benches to relax on. Those wishing to donate a memorial bench to commemorate a loved one can also do so by contacting the City Parks Department or Historic Preservation Office at City Hall."
So, that could be one option for donating a memorial bench.