If you are looking for the official online tool to find replacements for electronic components, the NTE QuickCross Online is the primary resource. NTE QuickCross Search Options NTE QuickCross Online
If you meant a different expansion of "NTE" (e.g., a neuroscience enzyme, or "Non-Technical Evaluation"), tell me which one and I will update the paper and replace example entries and sources accordingly. nte cross reference online