If it's long enough the Tri-cast cupping kit is the strongest I've seen, it's expensive at a bit over £50 but you get what you pay for! I know a couple of guys who use them on Daiwa poles because they use a lot heavy leam / groundbait and they swear by them. You can reach them on the following -
TELEPHONE +44 (0) 1706 861807
FAX +44 (0) 1706 643336
E MAIL
sales@tri-castfishing.co.uk
Good luck, cheers....Mark