http://www.medelabreastfeedingus.com/products/breastfeedi...
This is the Medela Supplemental Nursing System. I won't lie - at first, it's a pain in the neck to get the knack of positioning the tubes to tape them correctly on the breast/nipple. But it's the perfect way to make sure your little one is getting the milk they need when they don't have a good latch, and also make sure your supply doesn't tank. You could get the SNS ready in front of him, by putting whatever you give him now in the SNS and telling him it's his "new bottle! YAY!"
He's 11 months now, so you can tell him "no bite!" and perhaps latch him on yourself. Hopefully he will be encouraged by the ready flow of milk enough to latch on like it's a bottle. The only other thing I can think of is to get videos on YouTube of mom's nursing their toddlers and let him watch the videos. Then present your breast and see if he follows the lead of the other kids in the videos. If that doesn't work, take him to a breastfeeding support group. He'll see the other kids nursing, from baby to toddler, and then you can present your breast for nursing and don't have to feel yucky about it. Hopefully he'll follow their lead!
Good luck.... I hope you can make it work!