Seems like I can help you! I finished my Bridget cosplay last year and I have to say that my handcuff was a success.
I made out of upholstery foam, glue and paper. I cut out a base shape for the handcuff out of it and then used brown packing paper dipped in Elmers glue (just like paper mache but with straight glue) to cover it. It took a while and I had to do between 3 and 5 layers but it was really worth it. It's very strong (I can throw it against a wall and it's fine) and it is light weight as well. Right before Sakuracon I took cardboard and glued it to one side of the handcuff so I could make the rivet (I'm not sure that's what it's called but oh well) and so I could cut a little keyhole in it. I used about 3 layers of cardboard and did about 2 more layers of brown packing paper and glue. Then I gesso'd the whole thing so it was a bit smoother and spray painted it. About the only problem I've had is that if you run into too much stuff the spray paint comes off and the white shows beneath it.
As for the shoes mine always look good but fall apart horribly, so I'll be checking up on this thread to find a better way to make them.
Hope I helped a little!
Fluttershy (V2.0)- MLP:FIM
Milk (Love Love Sugar)- Pop'n Music
Ramona Flowers- Scott Pilgrim vs. The World the Game
Member of TigerDick cosplay: "We are cool and ballin' dudes."