Halloween // Marine engineer uniforms for a party....

I have been hired to put together a company party for a company that works in the biodiversity sector and want the waiters wear marine engineer uniforms. It is indeed the first time I have ever gotten a request like this and I am a bit taken aback by why would they want to do this but apparently they have a whole theme going on with the interior decorator and the costumes are an integral part of their the whole thing.

Go figure anyways, its my job to source items, not really to ask why. So my quettion is that I am going to find something that exactly fits that description but I may be able to find a different kind of uniform that looks like a marine engineer unfiorm, does anyone know what that could be? I was thinking maybe a sailor uniform or something all white? Am I thinking of the right kind of costume, or are marine engineer costumes the ones that are bright orange?

Anyone that knows what I am talking about I just need some clarification on what the uniform should look like so its authentic. Since its a biodiversity company I guess its important that I actually get the color and details of the uniform right. the ones I have found online during my resarch on amazon and alibaba, are a variety of white, dark blue and orange, I have to purchase in bulk in order to keep cost low, we have about 20 waiters for this event.