I'd also suggest you try a larger nozzle size. going from 0.4 to 0.6 and thicker layers can make a big impact on print time
Its pretty simple to change the layer heights and nozzle size in the slicer to see impact on print times.
Also you can print fewer perimeters. The dimensions of the outside edges will be the same, but the parts will not be as strong.
But it doesn't really look like it will take long to print that part. Long in 3D printing terms is more than 24 hrs.
