Any aluminum track frame with decent/non heavy components should be about 15 pounds,

take say a RRHP, PC, or something along those lines with a carbon fork, low flange track hubs, lighter rims, possibly tubular, any track crank, light seat post like Thomson, light seat, alloy bars and stem, and there you go.

you could even save weight buy running the smallest chain ring and and cog possibly for the inches you want, to cut some weight and chain links.

most of the weight in track bikes comes from the threaded stems, heavy highflange hubs, deep/heavy rims, and bars we use.