Amazon is your friend. Speeco has a store on Amazon. I picked up a HaulMaster Cat 1/2 hitch from Harbor Freight for $99 a few years ago, 1/3 the price of a Speeco. It ain't a Speeco, but if I got some red paint and some Speeco decals, you probably couldn't prove it isn't a Speedo. Everything about it looks exactly like the Speeco.
One thing I didn't like about it was the flat spots on top of the bottom hooks (just like the Speeco) and how tight the top hook was, making it little better than just using the pins of the standard hook-ups. So, I went to work with my grinder and beveled the edges of the hooks so that it would go in the pockets of my box blade much better and actually guide the QH into position. The only thing that would make connecting implements any better now would be top and tilt hydraulics. Before the mods, I usually had to get off the tractor and use a pry-bar to move it around so it would slip in. Now, I back up, hook up, and leave. I've got some photos of it in my media if you wanna have a look.