This works pretty well for me and it didn’t break the bank: http://www.amazon.com/gp/product/B0126JQ9G6?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
You can find JY doing LR in PT69 S1+S4, and PT71 S1+S3. And Jon also had an epic timed LR section video, which took him only 19 minutes. https://www.youtube.com/watch?v=F4vY0KpviJw&index=6&list=LLaknkMoRl59wmjfBX67-nFg