I knew I had seen this somewhere. Whe I first started out making bows, I ordered one of these kits off of ebay to try them out. http://cgi.ebay.com/MAKE-BOUTIQUE-HA...item43a13aad2c
It is a series of fig 8 bows with spikes. Looks like the ones you are looking at are made with 7/8" ribbon and lots more to make them look fuller.
Just stack spikes and fig 8's on needle and stitch, with marabou or korkers in middle. HTH