Is there any other drug that gives off the same feeling as Oxycodone? I am looking for a pain killer (oxycodone style) but they are sooooo hard to find, esp over the net (if not impossible over the net).

I herniated a lower disc in my back about 7 yrs ago. Through thearopy and pain killers I did really fine until about 3 months ago. I picked something up and it screwed me all up. I would go to the doctor but the problem with that is I just lost my ins through work as my plant is closing down in 2 months (where I worked for 9 yrs). I dont want to go over this whole thing again with a new doctor and then have them re-do MRI, ect. I just need something to help out at nights because that when I get the most pain. Anyhelp would be great. Thank you.