Primarily looking for low timeframe (5sec-1min)stock data with both bid and ask hi lo bars from before 2001. And forex bid-ask data before 1999. For mayor low spread instruments like sp500 index components ,low spread forex pairs etc. Due to bid ask lo hi bars rarely used in market data industry tick data is also fine as it can be converted.
You never know what data someone may have. Thompson reuters, tick from 1996. But i suspect prices are not reasonable as its advertised as institutional.