Know where to get a desktop cradle?

I know this is a long shot, but does anyone know where to get a desktop cradle for a normal price? I only know of two for sale on the internet, one is $80 on eBay and the other $100 on Amazon. Sorry but that's just crazy. This is getting really frustrating because I just got the phone and I don't want to wear out the gasket charging it every night.

If I can't get a cradle, what are the pin voltages? I think I read that they are 5v and the pin closest to power is positive...can anyone confirm?

Thank you!