My friend has Broughill aftermarket one made in Taiwan for $7.50 for 2 (one wheel). He also has the same brand in the Ultegra/105 type for $11. If you want the even older ones with the metal brake shoes, he can probably help out there also but certainly not genuine Shimano. I do not think the price is any better than what you had before, but he is local to me in Burwood.
Stay fixed. Keeping a cool head.