I've purchased intra-day data on the ES from several spots, e.g., Tickdata, and while it includes last trade prices, it does not include Settlement Prices as set by the CME each day. Does anyone know a source for settlement prices for the ES for current and past contracts? I know I can find the past few months on CME, but need data going back further. I assume this available somewhere for free, but haven't located a source. Thanks in advance for any help.