Is it possible to run fastboot in a recovery mode shell (without connecting to PC)? I have a method for unlocking the bootLoader of my HP SlateBook x2 running Android v4.3 consisting of:


Booting into recovery.  
Connecting to PC via USB cable.  
Sending the command fastboot -i 0x03F0 oem unlock to the Android device.


But this device has an incredible problem: it sells without USB cable (LOL), so I have no USB cable at all.  

But I have installed TWRP recovery, that includes a root command-line shell. So, as long as I can not connect via ADB bridge by using USB cable nor ADB via Wireless (the recovery mode does not detect the Wi-Fi card), I was wondering if it would be possible to use this shell to send the fastboot command from recovery mode in the stand-alone device (without any connection to PC, as long as it is not possible).

Any ideas, please?
Fastboot commands are for the bootloader, not recovery, so even if you send the commands from recovery, it would do no good since you would be in recovery, not the bootloader. 

According to all the information I could find about this "tablet," including information from HP, indicates that there is no way to access fastboot since there is no USB port and HP doesn't make a dock-port to USB cable for the tablet. Edit: apparently HP does have a cable for it, but it may be difficult to find and isn't cheap.