You could actually write to Mayer. I suggest the following:
Dear Mr Mayer,
I have recently wasted £10 of my hard earned money on your Art Tatum Improvisations disk. God know what your are improvising on, but it sure aint Tatum.
Your playing is stiff, straight, and about as close to Jazz as Clementi.
It is my intention to start to learn Tatums music, with the song "Emaline", which is incidentally the one you make the biggest hash of.
I wonder if you would be so kind as to share with me the written notes, on the understanding that i will play it nothing like you did.
Regards
Elevateme_returns