Unfortunately it is not possible to exchange the aluminum heat shield on the Looft Lighter I as it is fixed to the product. But no need to worry, a damaged heat shield will not affect the performance of the Looft Lighter, mere the looks of it.
It is very important to pull the Looft Lighter away when sparks or glow appear – Please see this video on how to best use the Looft Lighter - https://www.youtube.com/watch?v=T53OhNYaW74&t=1s
The damage will not affect the performance of the Looft Lighter, mere the looks of it. We have tried and tested multiple materials for the heat shield and especially experimenting with stainless steel to prevent it from melting/deteriorating. However, your safety is our first priority and stainless steel gets glowing hot which can cause severe burn damages to skin and also set fire to nearby objects like cloth, paper, wood etc. Therefore, we chose to use aluminum thanks to its ability to cool down quickly and prevent burn damage and fires.