I also have wrist splints supplied by physio - on my 4th pair. Nothing for elbows.
They stabilise my wrists but allow my fingers sufficient movement to type. I had purchased a nice pair of black ones but the splints come too far up the hand making typing more painful. The key is to try them on first!
Although I don't use them for typing, I have resting splints to wear at night. They are moulded to your shape and strapped on, theoretically keeping wrists and fingers straight (my fingers still manage to make a fist). Not sure that they are widely available though as apparently rather expensive.
I don't know if you can have special software but I swear by my RSI guard - it is to limit the use of the mouse as it will click for you automatically or you can programme keys to perform different functions.
Hope some of that helps.
Angie
Be yourself - everyone else is taken. XX