Find a short lenght of flat steel bar, bend it around the battery post to make an Omega shaped clamp, which will not close fully on the legs when clamped around the battery post.
Make one of the legs long enough to fold it back and make a flat clamp for the cable(s).
Drill a hole through both legs (and cable clamp folded back) and use a 6mm bolt & nut to clamp it on the battery post, making sure the cables are well and truly seated inside the clamp legs.
Its not really needed to torque it, just tighten it to make good physical contact.
Now you can get through the next week while you find any standard poleclamp kit at your nearest car equipment dealer. These are universal and have a separate clamp to securely bolt down the cables. No need for huge size fancy crimping tool etc.
Such a clamp kit should not cost you more than a 5'er.
Funny thing is it will last much better than the original part - at a fraction of the cost
