This is using a Cree/Wolfspeed CGD15HB62P1 gate driver board as a replacement for the Tesla one.
The CGD15HB62P1 is sold by both RS and Farnell, and probably others, so it's something which is readily available.
It uses the same Infineon 1ED020I12 driver so is compatible with anything which connects to the original Tesla board.
The board plus DC-DC converter comes in under £250 (inc UK VAT).
They are not the right shape to fit in the original space, but there is space above the IGBTs to fit a board so will fit inside the inverter housing.
This board is intended to be used with a Cree IGBT module, so it needs some modification.
The supply is 15vDC instead of 12vDC so needs a DC-DC converter,
also the board is intended to be connected directly to the gates so a connection needs to be added before the on-board gate resistors.
If you are intending to connect the original logic board you will also
need a lead to convert from the JST plug to the Molex socket on the CGD15HB62P1 board,
This would need to include the DC-DC converter inline.
Checking V-phase Motor input (PWM ~4kHz, field rotation ~1kHz)
TIME:200uS/div, Blue:MCU V-phase(2vDC/div), Red:MCU W-Phase(2vDC/div), Green:MCU U-Phase(2vDC/div), Yellow: Motor V-phase(4vDC/div).
Adding Schmitt Triggers
7414 Schmitt Trigger inverters are very fast, in the order of 10nS switch times.
This is much faster than the BC5x7B circuits so it makes sense to use one as an inverter.
Also having 2 in series provides a good buffered output.