To address the reliability and stability issues of explainable artificial intelligence (XAI) methods in data-poor environments, this paper proposes Instance-based Transfer Learning (ITL-LIME), which integrates instance-based transfer learning into the LIME framework. To address the locality and instability issues caused by random perturbation and sampling in conventional LIME, we leverage real instances from related source domains to assist in explaining target domains. We cluster source domains, retrieve relevant instances from clusters with prototypes most similar to the target instances, and combine them with neighboring instances of the target instance. We weight instances using a contrastive learning-based encoder, and train a surrogate model using the weighted source and target instances to generate explanations.