Yes! Olympia Sports is a small but well-stocked ski shop in Zinal, just 2-3 minutes walk from the base station of the cable car. In Grimentz, Val Sport offers a wide range of equipment and is just next to the Hotel Alpina.
GZBA will provide you with transceivers, shovels and probes free of charge. Further avalanche safety equipment (including ABS airbags which we strongly recommend) and ski touring equipment (ice-axes, crampons, harnesses and helmets) can be hired from the GZBA team.
See here for more information about equipment.