lucky you are, you are good in time
Nevertheless, I can suggest you contact one of the following companies. They are ground handlers for international tour operators and most of them have their own wedding department specialized in people like you. They do the paperwork and the organization of the party (place etc). They have lots of ideas for every budget...
According to my knowledge they are all absolutely serious. The list is not complete, there are more (although I dont get their names in mind)
I don't have their websites but thanks to google should be easy to find
White Sand Tours
Another way is to contact a hotel directly, they do external (not in-house guests) weddings
If I can give you another tip: don't try it alone, its more than stressful and you will not be able to enjoy
Hope it helps and good luck