The repair costs will vary - in the same local area and from repair shop to repair shop.
Be sure to obtain 2-3 written estimates for the same work, and also be sure to replace the all the transmission and engine mounts at the same time, as there are the same age/mileage - as cheap insurance.
Try these on-line parts resources; www.autopartsanything.com; www.partsgeek.com; www.Rockauto.com, www.stockwiseauto.com - to list only a few.
In fact, they (RockAuto) list the replacement engine / transmission mounts (4 parts) as a kit. Individually these priced from around $9.50 each for your vehicle - four (4) mounts are required.
Motor mount kit = SKP part #SKM3062K - or it's equivalent