Coming back to the beautiful Playa Blanca in September to the villa i stopped in 2 years back, but does anyone know where i can purchase an inflatable pool chair instead of the typical inflatable beds and rings? Any help would be much appreciated

I'd say any place that has the usual rubber rings and beds outside would be a good bet.

The nearest trinket/Chinese shop or large supermarket will probably fit the bill.

I bought one last summer in one of the shops on the main street (Avenida Papagayo).

You could try the Montana Villas and Pools shop which is on the industrial estate behind Home Zentrum., just off the petrol station roundabout. They have lots of great things for the pool like inflatables and toys.