Ali-Arc does make an aluminum bumper but I don't think it is very good quality.
Shadrach
I'll give you my two cents. In southern Iowa we have a HUGE white tail deer problem. Its not if you hit one, its when. My father has a T600 kenworth, and if you hit a deer with it, then you will likely by a hood, aftercooler, radiator, a/c condensor, tow bill, ect. I started researching a gaurd for the front and found the Ali Arc. They are a company that is based in Canada, and Austrailia. There is posts on thier cite where guys have hit MOOSE, and drove home their semis. We bought one for our T600, and it is substantial, all aluminum and lightweight. They are so sure of thier mounting, and such that they had a pin in the front to pull the truck when it it stuck, 80,000#+ stuck. They made their name protecting semis from Moose and Kangaroos. Dad has probably hit 15 deer in the last two years with no damage to the truck or the gaurd. It has paid for it self many times over. Many of the neighbors have bought them for thier trucks. Even the local fancy, bull haulers and tanker yankers have bought them and painted them to match, to protect there long hood Petes. My father bought there grill gaurd that mearly bolts onto the frame, and does not replace the factory bumper. He bought one for his Excursion, and one for his dodge. Last winter the Excursion rear ended a dodge pickup, putting two nice creases in the dodge's tailgate, pushing it clear in the bed, and hitting the bumper. The damage to the Excursion? Cracked bug shield. Drove away from a wreck that would have taken out the grill, the aftercooler and radiator.
My brother bought the full bumper/grill gaurd for his dodge, and has knocked down many deer. He ended up t boning an old lady, pushing the passenger door of the car, against the driver. His dodge was totalled from a bent frame, and such.
I love my Ruenel, and I like the looks. It was 300# shipping weight and has stood up just fine. If you like the looks of the Ali-arc, believe it will do its job.
Michael