I'm sorry, but it seems I couldn't find any specific BT50 stiffeners in my current results. I'm still in the experimental stages and may not have access to the entire PriceCheck catalog just yet. However, if you're looking for other parts, I can suggest some options like the Bonnet Hinge for the Ford Ranger or the Headlight Guards for the Mazda BT50. Let me know if you're interested in those, or if there's something else I can assist you with!