I can't find TLEs, but here are two US satellites in Molniya orbits:
From the Southwest Research Institute's page for the TWINS mission:
TWINS flies as a mission of opportunity on two high-inclination, high altitude spacecraft provided by a non-NASA US government organization. Each spacecraft is 3-axis stabilized and approximately nadir pointing, and is placed in a Molniya orbit with 63.4° inclination and 7.2 RE apogee, an ideal orbit for magnetospheric imaging. TWINS began its stereo imaging mission in June 2008.

The Wikipedia page for TWINS says:
Using
$$T = 2 \pi \sqrt{a^3 / GM_E}$$
from this answer with $GM_E\approx$ 3.986E+14 m^3/s^2 one can verify these have periods of a half-sidereal day.