Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
The mounts are not available after market, (that I can find) so you might want to get them and see if there is a reputable repair shop that will install them. Of course, you may only want to replace the ones that are needed.
I would say that a fair shop would do all of the engine mounts for a certain price, as there will be some overlap there. Below are the prices, (OEM) along with the labor times. Where I am at the average labor rate is around $65 per hour outside the dealership.
What does standard mean - approximate time to remove old and install new mount?