Vinegar and salt work on some of the older type of organic dyes but, unfortunately, they tend not to work on new fabric because dyes these days are almost all chemical in origin and require chemical setting.
Try cutting a small piece and washing it. Fibers can absorb only so much dye. If the dye was set correctly in the factory, but the fabric was not rinsed properly, the problem may simply be excess dye in the fabric rather than unset dye. Washing will get rid of excess dye. After washing, test again. If fabric still bleeds then it may be unset dye. You don't want to keep washing it if it is unset dye, because the fabric will fade excessively.
You can order Retayne at Amazon and probably pay for overnight shipping.
Update: Here is a link to Retayne on Amazon:
http://www.amazon.com/Retayne-Color-...dp/B000YZ5HL8/
I'm sure at checkout you can upgrade shipping to overnight (for a price). With my Amazon Prime (free 2-day shipping) I will usually receive something on Saturday that is ordered Thursday night; however, Saturday delivery is not guaranteed and if it came on Monday that might not give you enough time. Oh! I just read the fine print on that listing and you do have the option of paying for guaranteed Saturday delivery -- shouldn't be *too* much on a 4-oz bottle, should it?