Improve MISO LMP Data Sources
Here is a much better data source for MISO day ahead LMP market: https://www.misoenergy.org/markets-and-operations/real-time--market-data/market-reports/#nt=%2FMarketReportType%3ADay-Ahead%2FMarketReportName%3ADay-Ahead%20Pricing%20(xls)&t=10&p=0&s=MarketReportPublished&sd=desc
Here is the similar source but for the real time market: https://www.misoenergy.org/markets-and-operations/real-time--market-data/market-reports/#nt=%2FMarketReportType%3AReal-Time%2FMarketReportName%3AReal-Time%20Pricing%20Report%20(xls)&t=10&p=0&s=MarketReportPublished&sd=desc
These sources provide historical data back to Jan 1, 2020. Only two downsides appears to be that it only have top line LMP and doesn't break down components and also only has data about the hubs. I think both of those tradeoffs are worth it