Yes, you can spend about $150 and have the trans mount, rear diff inserts KDT903, and trans crossmember bushings.
I would advise not getting the KDT903 and getting KDT905 and KDT906. For KDT905 you'll have to get somebody with a hydraulic press to press out the stock bushings which are enclosed with a metal sleeve. You can press the new bushings in easily by hand.
I'm having the KDT906 installed next week. For that you have to drop the rear diff and remove the rear subframe to press out the stock bushings. That was not something I was willing to do myself with the car on jack stands. As much as it pains me to pay for labor, I won't mind it one bit on this part.
I'll post my thoughts on the firmness of the rear end next Friday. Solid bushings vs. inserts. I'm hoping solid bushings dominate!