Copy strategies have leverage 1000, featured brokers 500

Currently there are some leaders with brokers of as high leverages as 1000. But I don‘t see 1000, max. 500 only once in the list of featured brokers. Neither on several lists and searches in the web. Those lists are often outdated and the real leverages even smaller. But these numbers are needed to copy the strategies correctly. The strategy providers obviously know these brokers. How do I find them?