I recently bought a rooCase Executive Leather Portfolio case. The tablet goes in a sleeve type case which then velcros into the portfolio part.. Does anyone know of a keyboard+case that uses velcro to attach the tablet. I don't want to have to switch sleeves everytime I switch cases.

This is partially do to the fact that I don't want to buy a new case making my current one obsolete. It will help me feel like I didn't waste my money. :-P