Creme Eggs can now be bought individually or in bulk (3s, 18s and even 48s!). You can buy Cadbury's Creme Eggs online from Cadbury's Gifts Direct for £18 for 48 or £6.50 for 18.
Unsurprisingly you can also buy Creme Eggs and related memorabila from eBay! Currently there are chocolate eggs as well as mugs, clocks and even egg cups available to be buy via the auction site. Interestingly there are also auctions for a Cadbury's Creme Egg chocolate bar.