The first item above (Mast Hound) is the one you want. Extra tangs each side for running backs would be very good, the tangs that are there are for the intermediate unless this is installed at or very near an upper spreader set. A sleeve thru the mast
around the thru-bolt might be in order too so that you can't over-tighten the bolt.
The second item above (Attachment Tang) is light to medium duty and is intended to support things like a spinnaker
pole topping lift
, taking forestay loads would probably rip it off the mast in a short to medium amount of time.