Yes. Everything in your car is ethanol compatible. Here are some coyote injectors for $120 a set
http://www.ebay.com/itm/Fuel-Injector-Ford-Mustang-11-12-13-14-OEM-BR3E-9F593A-M-9593-LU34A-0280158277-/181495626226?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AMustang&hash=item2a41fb79f2&vxp=mtr
You may not need them though. The stock injectors might do just fine, not sure. I know that Justin VMP has done e85 with a stock 4.6 3v and didn't change the injectors out. Make sure of your tuner when you go with the 34lb because it isn't a value file so your tuner will have to be smart enough to tune injectors or have the coyote file available.
You might also need a bap or larger pump. Probably not. I ran 408rwhp supercharged with the stock pump before. That should be enough headroom for your setup.
Are you planning anything else in the future? It might make sense to get larger injectors now instead of buying them a few times for each upgrade.