I've checked Jann's and Barlow's...but when I called Barlow's the lady said that the molds are set up more for the 570/575 hooks and not made for sickles (matzuo).
The sickle hooks will basically interchange with the 570/575 hooks.
You just need molds made for that style hook.
Look at the description listed on the sickle hooks:
"Wide gap sickle bend, Aberdeen style, ultra sharp,fine wire hook with black nickel finish. These hooks will fit most molds that use a 570 or 32756 style hook."