No and no.
But feel free to try and fit the K50 shifter. If you try hard enough and change something it could fit. You can use the shifter from a T-18. It has a slightly different bend but works the same.
For starters see the Tech Article. I tryed to list every starter that fits the 4A-T50. Basicaly, any starter off a AE82, or AE92 with 4A-GE, or AE71 or AE86.