Well, I finally received almost all of the missing parts of the 3-point hitch yesterday! The person I purchased my 4110 tractor apparently had never used it and put it aside and forgot about it. But he found them and shipped to me. Did an inventory, and all parts are accounted for except the top bar. My dealer said a genuine JD replacement part costs $280, while an aftermarket one would cost $25-30. He suggested for my use, the aftermarket brand would be just fine, so that's what I ordered.
Along with that, I ordered what I would most likely need to repair the front axle leak. While I was at it, I also decided to order a few misc parts like... an iMatch Quick Hitch, Frontier RC1048 and a 647 tiller.

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JD4110HST, 410FEL, 46BH