I have worked with several breastfed babies with the same problem. The nipple that worked best was the latex playtex drop-ins. The feel more like real skin and they are shaped like the breast. One little girl had to be "tricked" into taking the bottle:
Her mom would begin nursing her, while keeping her in the nursing position would pull her breast out and stick the bottle into her mouth. The baby would latch onto the bottle and start drinking. With the baby still drinking the mother would slowing turn her away from her body and pass her over to me. This ensured the little girl that she was still eating, but she learned she could get food from someone other than mom. After a couple times of doing it this way, I was able to get her to start a feeding from a bottle. I would swaddle her (which was something she loved and made her feel comfortable) then I would hold her in the nursing position and offer her the bottle the same as the breast would be offered (gently rubbing it on her lips to get her to open her mouth). Once she would begin drinking it I could roll her over and unwrap her if I wanted. The mom would then give her a little "dessert" nurse once she was finished with the bottle. (she didn't want her to associate the bottle meaning there would be no breast and end up with bottle refusal).
After about two weeks of this process, she was gladly feeding from both the bottle and the breast at any point throughout the day just fine and with anyone offering the bottle.
The biggest key to teaching a baby to take a bottle is be consistant and patient! Good luck!