You can try to hold up a lens to the camera without mounting and shoot, I think people call it free lensing to get the same effect. I think there are also tutorials to make them out of a spare lens and toilet plunger for a few bucks. id try that route before actually buying a product which may create an effect Id only use a few times.
Thanks - That indeed might be worth while trying. I have a few lenses at home that would be suitable donors. I could possibly also get away with an enlarger lens as well