The SD HxC Floppy Emulator with a 3"1/2 form factor is available :

The SD HxC Floppy emulator can be buy on the Lotharek ebay page :

http://shop.ebay.co.uk/lotharek1977/m.html

Or on the Lotharek online shop:

http://www.lotharek.pl/
http://www.lotharek.pl/product.php?pid=42

Specifications :

Device specifications:
SDCard_HxC_Floppy_Emulator_Product_Brief.pdf

User Manual:
SDCard_HxC_Floppy_Emulator_User_Manual_ENG.pdf

Compatibility List (regularly updated):
Support List

For more informations, software update and firmware update:

Project website : http://hxc2001.free.fr/floppy_drive_emulator
Project website : http://hxc2001.com/
Project Forum : http://www.torlus.com/floppy/forum
Official seller : http://www.lotharek.pl/