Dajia Cycleworks Stainless Steel Rear Expedition Rack
The Dajia Rear Expedition Rack is a sturdy stainless steel rack intended for loaded touring. The emphasis is on strong construction and reliability, not Grand Cru-level finish. But the sandblasted gray finish is attractive in a practical no-nonsense way, and the stainless steel construction means you needn't worry about corrosion.
It's perfectly sized for 700c wheels, but it can be used on 26" and 650b frames as well. There a rear light mount with holes at the standard 50mm spacing. Max load is 25kg.
Note that this rack is intended for touring frames, so if your frame has short chain stays and you have big feet, there might be heel clearance issues.