Mike,
I got the rear remote kit from my NH dealer. The part number on my invoice is FNH 718348013 and it cost $253. I have not installed the second set of remotes yet as I have not had a need for them. My dealer did quote me a price of around $225 for the second set.
I got the hydraulic toplink right from Gearmore out of California. The part number is T3X8-18 and it cost $270 plus $20.28 to ship it standard UPS to Michigan. They have no distributers over here so they were willing to sell it to me directly. They will not accept a credit card, they ship it COD. I am very happy with the toplink, it seems to be very heavy duty. You can no longer use the toplink hanger to hold this toplink up when not in use because of its size. I will attach a picture comparing it to my factory toplink.