Successfully added an iPhone 7 Taptic Engine to a 7th gen, plus 256GB flash mod and 3000mAh battery. This iPod can last over 130 hours of continuous playback on a single charge. :
iPhone 7 teardowns: Big Taptic Engine, Intel modems, waterproofing, and more | Ars Technica
NEW iPhone 7 Plus Vibrating Taptic Engine Replacement UK A1661 A1784 A1785 A1786 | eBay
iPhone 7 Plus Taptic Engine Replacement - iFixit Repair Guide