Hey thanks. I am just another guy who likes spending (too much) money on books.
Tiger 201 that knocked out "Fireball" and Tiger 211 that was knocked out by Sgt Nicholas Mashlonik’s Pershing, were both from schwere Panzer-Abteilung (Funklenk) 301. These were final production Tiger I handed over by schwere SS-Panzer-Abteilung 503 in October 1944, after finishing the basic training (sSSPA 503 carried on with the Tiger II). If you are interested about further details, then I'd highly recommend Steven J. Zaloga's booklet "Pershing vs Tiger: Germany 1945".
Trivia bit: Even though the unit had 13-15 Tigers in the inventory (March '45), only handful remained operational (plummeting down to three, all blown up by the crew, 16 April in Sprockhövel)