I think there's some confusion. The stainless steel lugs can be finished with polish to match the stainless steel body, or be finished matte to match the aluminum body, and of course they can also be colored to match the various colored bodies. I am saying there are many finishes you can choose from to find one that closely matches whatever your watch is.
If you are asking for lugs literally made from aluminum, I don't think they exist. Lugs and pins and stuff like this shouldn't be made from aluminum because it's soft and bendable, so they make them out of steel. If these were made from aluminum, either the thin rod holding the strap would bend, or the rods would have such tiny aluminum threads that the screws holding the rods to the lugs would strip those threads right out.