If you are wanting to get a key made, custom or otherwise, IIRC the Volvo V7 key blank is the same as the RIII's. If you get a couple made up at the local key cuttery then you could have all sorts of fun making your own custom key - although if I made one it would not be as good as they make them. Maybe Chris could make matching ones for the flyscreens etc. that he makes.
Personally though, I haven't used a key for years.
I have the "Smoothie" - it blends in with the rest of my bling and doesn't draw any attention from onlookers - they have no idea what it is, allowing me to leave the key in the ignition when I'm nearby.