Honestly, if a
bonding company requires an ILOC, there are typically better options.
For instance, you could try and post the ILOC directly with the obligee. They willl likely release it sooner than the surety and you wouldn't have the cost of the bond.
Sometimes there are trust funds you can do in lieu of the bond like for
freight brokers.
It is rare that a bond with an ILOC requirement is your best bet, but that is typically when it is your last option.