This was ~Catherine~ from here's cake. It's the same as your Ruby but with different coloured flowers. I think it's absolutely gorgeous and squeals elegance and class. It would suit your theme beautifully and not be too 'over the top' for a lunch time reception. The touch of red would match the car and you could use a green ribbon if you wanted to tie that in to it all.
You could 'steal' ~Catherine~'s bouquet too!!!
