Ive been on plenty of cruises that leave the country and I have never been through customs when leaving the country. I cant say what happens to your bags when you first board the ship. You drop them off and they arrive at your room that night or the next day so those may get searched. But...
ive been on plenty of cruises and taken shit with me. boarding the cruise is fine. Getting off the cruise and going through customs is where you have trouble. ive been down in belize and stopped in the pharmacy and picked up shit and walked right on the boat with it.
just an update from the uniquemicals website,
"MK-2866 is back in stock! LGD-4033, MK-2866 and S-4 are all now available to ship in 24 hours! Email confirmations of shipments are still being worked on."