GTR1 is amazing and a joy to use. I greatly appreciate the many years it was available, and earnestly hope it returns. Can I do anything to help? I haven't found anything close. Maybe I'll sign up for P123 and try to duplicate some GTR1 results. (First step would be ETFs.)

Finding quality fundamental data sources would help. Has anyone looked at what's available lately? finbox uses Standard & Poors Market Intelligence data. CRSP data is used by many academics (e.g. Fama French data library). There are other data sources (e.g. refinitiv, factset). Maybe there's enough of us to afford better data.

There are also several quant websites: quickfs.net quantrocket.com businessquant.com ...

I would be interested in having a conversation, maybe offline, about the opportunities here and possible ways to divide up the work.