Shimano BL-R600. They are more ultegra or dura ace level than the '105' level of the still produced BL-R400 brake levers. A little hard to find, however.

https://road.cc/content/review/6810-...00-brake-lever.

If you don't mind the grey on the BL-400, just get those. There are also tons of brake levers from the late 80s and early/mid 90s on ebay that are essentially the same thing as the BL-400. RX100 brake levers are an example. Dura ace 7400 levers are expensive and the hoods are no longer produced.