I just bought a CF adapter from AmigaKit. Shipping to US and total cost was $29. I got it with 3 IDE ribbon and it comes with a pre-formatted 4GB C.F. disk and a back up OS-Install floppy disk. This is actually a excellent product and I have setup my A4000 easily with it. For the price it is the best deal, plus supporting Amigakit is always a good idea. Here's the link
http://amigakit.leamancomputing.com/catalog/product_info.php?products_id=883