sizing a DC bias RF choke for a differential antenna + PA
Since the impedance is differential, you actually only need half the impedance on each side.
You don't need to "cut" harmonic power in these inductors - in fact, you want to absorb harmonics. Therefore an SRF above the fundamental is acceptable.
The third harmonic is 3x the fundamental, not 4x. (The first harmonic is the fundamental) Just FYI - it does not matter in this case!
Small PCB loop antennas are already lossy, so you don't need "tenfold" reactance or a super Q for, say, less than 1dB of additional loss. Without calculating, I would guesstimate 5x to be workable.  (It will slightly "pull" your antennna's center frequency though.)
Based on the above, an RF inductor like the 470nH from Johanson is a workable candidate: