Radiator Neck Kit - 1988 560SL

I reviewed with interest the description of the radiator neck repair kit offered on this site. Not having had any problems - never gave it another thought. After an enjoyable cruise last evening along the Niagara River, before putting the 560SL away, I was checking the oil level and was shocked to see the smallest little bead of coolant at the base of the upper radiator neck. It was only about 1/32" but when I wiped it away, it slowly reappeared. Kent, is it too late for me or will your kit save my bacon? If not, can I assume you have a better replacement rad. available?