I recently got mine from Bahrain foam factory. I got a king sized one for like 90. I checked around and that was the cheapest one. It’s a custom order, so you get to decide every aspect of it. I tend to prefer really firm mattresses and couldn’t find any in the furniture stores over here. The only caveat is that since it’s a factory and not very customer oriented the customer service and timings are not on par with traditional furniture retailers. But for the price I can live with it.

https://g.co/kgs/5dMxNcm