Roy Asotasi fit the bill? He's 32 and coming to the end with South Sydney. Maybe looking for a final pay day with 2 more years in Super League before he retires?
Going back to Johnson he runs hard and although about 16 stone is really another second row playing out of position at prop. He was one of the best WTW forwards last season and is solid & durable.
I like him & R.A. was quite complimentary about him at the beginning of the season. I hope he pulls up trees on Monday against Wigan, brakes a few tackles, scores a try and proves doubters wrong