Regarding an "old" link to an HCL...that doesn't exist (to my knowledge). You're so far out of support at this point that it was aged out literally years ago.
Regarding the iSCSI support, there's really not such thing as a "generic" iSCSI device as they all behave somewhat to very differently even if the protocol they implement is said to be the same. I think at this stage, owing to the fact that you are running such an out-dated version of ESXi (nevermind supported), you'll just have to try it and see. It'll probably "work" to some degree, just don't pick new hardware on which to implement the iSCSI target.