cruise search engines

[azzuri]

Have you come across any creative cruise search engine where I could do a search based on the input of destination ports? For example, looking for any 10 day cruise where destination ports include Grenada, Dominica, St. Thomas and Bonaire.

Another creative search, I have been looking for was based on the number of sea days, for example looking for the same 10 day cruise going to Grenada, Dominica, St. Thomas and Bonaire but with no more than 2 days at sea.

Thanks!