If someone else has found yet Halogen R7S 80-100 Watt 117mm in length can also send me a product link, because that seems to be almost impossible. Large manufacturers such as Osram Sylvania or make such lamps until her from 120W or even 300W.
Another little tip on the edge, do not touch the glass with your fingers when installing such lamps!
Update May 23, 2015: After 2 months of use, the first lamp is still working. The lamp goes off automatically after 5 minutes and is at least 4 times running on the day, on weekends a lot more often. So on average the lamp 20 minutes a day, then what makes, in our case a month for 10 hours. With us after 20 hours of operation it still works properly.