Do the Pc+ pentaquarks have strange siblings?

The recent LHCb discovery of states P-c(+)(4380), P-c(+)(4450), believed to be c (c) over bar uud pentaquark resonances, begs the question of whether equivalent states with c (c) over bar -> s (s) over bar exist, and how they might be produced. The precise analogue to the P-c(+) discovery channel Lambda(b) -> J/psi K- p, namely, Lambda(c) -> phi pi(0)pi, is feasible for this study and indeed is less Cabibbo suppressed, although its limited phase space suggests that evidence of a s (s) over bar uud resonance P-s(+) would be confined to the kinematic end-point region.