Can you replace the DVD Drive for an SSD?

Hi I've been looking for tutorials for replacing the HDD for my iMac 27" and i found alot of them but as well i would like to replace my DVD Drive with an SSD but i dont seem to find one for it.

AS well i was wondering if someone knows if any of the DVD bay replacements will work like.

iMac & Mac mini Dual Drive Enclosure

or

http://eshop.macsales.com/item/OWC/DDAMB...

thanks