  The coupled-channel model [Phys. Rev. A {\bf 59}, 363 (1999)] that yields
converged low-energy phase shifts, and exact binding and resonance features in
Ps-H [Phys. Rev. A {\bf 59}, 2058 (1999)] is applied to study Ps-He$^+$
scattering. Similar to PsH, resonances appear in the S-, P-, D-, etc partial
waves in the Ps-He$^+$ system but in both the singlet and triplet scattering
channels. The latter signifies possible Rydberg states of $e^+$ around singlet
and triplet helium. The S-wave singlet resonance at 2.79 eV agrees to that
predicted earlier in $e^+$-He entrance channel (energy difference 16.64 eV) at
19.27 eV [Chem. Phys. Lett. {\bf 262}, 460 (1996)].
