If I were you I'd give it a try with some resident strapmakers from the forum...there are a couple of them on RG forum, such as Vanilla Gorilla and petergunny who really have some great skills...they posted some straps made for the BP which are really amazing...I am not sure about cajun straps (you can use the search button here on RWG) but I think he could make a really nice gator as well for your IWC...
good luck in your search!
a custom made strap is always a better choice...you can always work out something with the maker