How about repopping the washer bottle? Doing them over there and even including the original Chrysler logo and wording on them probably won't get you crosswise with Chrysler certification and royalties probably since you are out of the country. Or if that did turn out to be a problem, repopping one without the Chrysler logo would still be a good option for us as long as they look identical otherwise. Would be way more reasonable than trying to find a new NOS one and paying $600 for one.
I cast my vote to the windshield washer bottle, let it be the next piece. You'll be surprised how many of those you could sell. - My advice however is to leave the Chrysler Pentastar logo off of all items, for legal resons. Trademarks are international, protected by international treaties that is, so FCA would be after you if you used any of their logos or nameplates. Just leave them off, and you'll be safe.