My problem was, 'How to display them?' so when I found this 'Shabby Chic' style vase (which will look fabulous on my kitchen window sill) it inspired me to treat them as 'real' flowers.
(Close up of 'Shabby Chic' style vase)
...To do this I wrapped spare yarn ends around the ends of bamboo knitting needles, this provided an anchor to pin the brooch fastenings to. The needles are then placed in the vase, being held in place by hidden balls of yarn (No oasis for me!)