I have a couple of casting rods i use specifically for bait. One is a Tica UEHA, rated up to eight. A very good rod. I also use a extra heavy Pinnacle rated to 12 oz's, that's more than what you need. But I have found that those Pinnacle casting rods are a good bang for the buck. Usually around 75.00 bucks or so.
They have one rated up to nine ozs, with a sweet spot at around six.
There are many to choose from.