I'm kind of astonished that you can't find a manual eggbeater. We have had ours as a gift when we were married (which is quite a while before Allie was born.) It's an Ekco, and it's performed flawlessly for several generations. :o
Not that we use it all that often, but it's my preferred tool for whipped cream, despite having a large and mini-Cuisinart, a KitchenAid mixer, a Waring blender, a new 100-HP Vita-Mix juicer/blender, and a stick blender.
Oldies are sometimes goodies.