As it sounds like you are aiming to make a commercial product then perhaps contacting a wrecker or one of the larger Jeep Suppliers may be the go. Still won't be cheap as traditional they use a percentage of the new price.
I've also "hired" a component from a wrecker before... paid the full price and then returned it later for an agreed refund. I did know the wrecker reasonably well so there was a relationship already. But might be worth considering if all else fails.
Good luck in your hunt, but I think you may be facing the reality of wanting an expensive and rare part.
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It seemed like a good idea at the time........
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