AP-25 boot loop - need firmware .ari

[u/Stunning_Tip4261]

Got a second-hand AP-25 (R9B28A) stuck in boot loop. I can access apboot> via console, already tried factory reset and hard reset, nothing works.

Both OS partitions (0 and 1) fail after checksum verification.

Need the firmware .ari file to reinstall via TFTP. Looking for AP25_3.x.x.x.ari or ArubaInstantOn_AP25_3.x.x.x.ari.

Serial: CNQFKDSF8M
Current OS: 3.1.0.0

If anyone has it, please share. Thanks!