Hi and welcome.
If you pull the handle up and look at its underside you'll see a split/tab thingy. Put a flat point screwdriver into this and gently lever the tab towards the car floor whilst pulling the handbrake grip towards the front of the car. Keep it under control or you might tw@t your HU!
As for choice of fitments, suggest e bay, forum for sale boards etc.
Regards,
John