I have 5 drive sleds from a Norco SS-500 that died (backplane failure.) They are the newer style and don't fit my older SS-500.
Free to anyone who wants them, just cover the shipping.
I can confirm that reflashing an M1015 to IT mode works on a Biostar A760G M2+ (one of the recommended motherboards for unRAID budget server, now EOL)
I used the DOS tools -- I could not get the Linux ones to recognize a card.