Lin Ceramic tea refresher is out of production but I saw them ocassionally in some old shop in Malaysia and Taiwan. It is hard to get them. I saw and bought another design in Beijing tea wholesale centre but a bit too small to use comfortably.
When I travel, in case of emergency, when in someone's house, I ever tried using le Creuset cast iron pan to refresh the tea. It is risky as the tea leaves, especially the dust may burn. Have to do it in slow fire and very attentive with the smell to control the process. I tried using stainless steel pan but it is very hard to control the temperature.
In your case, maybe you can try with a small cast iron pan or a small clay pot with slow fire until you find the Lin Ceramic tea refresher. You must constantly shake the leaves to make them dance on the warm surface of the pan.
Refreshing tea is a great technique to increase the quality of the brew in many folds. I refresh the tea most of the time. It is tediuos and takes a lot of patience but I find the process peaceful and meditative. It is like having conversation with the tea. Haha Crazy me