The only thing I can think of would be the Shannon Princess http://www.shannonprincess.com/ Most cruising on the Shannon and other Irish waterways would be self drive cruisers.
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Two rules for Ireland, Take your time & bring a sense of humour
Ruairi Gibbons and his family operate the Shannon Princess and are wonderful people. A bit on the pricey side but if you're used to that style you can't go wrong enjoying their product.