I buy mine from my local craft shop for £3.49 each, with no P&P. Have fun with your cuttlebug, hope your cc is in better health soon Phree.
I usually buy mine from www.cuddlybuddly.com and the embossing folders are the same price of £3.49 but I noticed the Build a flower set is cheaper than other places so it is worth checking out the site. The p&p is a set price of £1 for whatever you buy and is always delivered very quickly quite often the next day. They sell lots of other goodies such as stamps which is how I found them. :D
Crafty devils or cheapdies are 2 good sites as well. Eileen