Man a bunch of people have their panties in a bunch. I did something similar to my gas tank. I ended up rolling a rock under the tank so that the weight of the rear end was resting on the gas tank. Luckily I only lost about a gallon.

You can try to pop out most of the dent in the tank. Pull it off and you should be able to get your hand or a 2x4 into the hole for the fuel pickup. Push from the inside and it should pop out. By the way, don't smoke around it gas vapors are easy to ignite.

If you end up keeping your X for a while, I'd invest in a Calmini skid for the tank. Otherwise, see if you can find one in a junk yard. The Calmini skid is not 100% protection. I've manged to dent my Calmini skid.