You can get creative by using a towel or belt as a strap, a blanket from home, and one or two supportive pillows in place of a bolster. (whatsupforkids.com)
As your baby develops inside your womb, you will find sleeping in this position more difficult and settle with other sleeping positions using supportive pillows. (newkidscenter.com)
Try propping your baby up to your breast level, suggested Breastfeeding Baby Comfortably, with supportive pillows on your lap. (romper.com)