The link to #5 is broken. Can you give any more info about the tool?
Specifically how much does it weigh and is is available with a fiberglass handle?
I'll bet that if you go to some big place like Lowe's, Tractor Supply, or Home Depot they will have them. (I got mine in a tiny local hdw store in Norfolk, MA ...)
Don't recall what I paid, but wasn't terribly more than for a plain maul.
Whatever the price, IMO, it was worth it in saved effort, stuck mauls, etc...