Unfortunately, BCUSB.3.01.SPI.hex firmware is not available here... You should make an account on blackcatusb.net and search for spi firmware...
Alternatively, you can always contact TIAO Corp., Customer Care for TIAO products;
They can be contacted via email at
. However they recommend you to open support ticket at http://www.csbooth.com
for fast, traceable response. They don't provide phone support at this moment.