Grafted sprout is an effective solution for avoiding the injury and I always buy grafted sprouts at a big sprout shop run by a farmer specializing for grafted vegetables. Grafted sprouts are more expensive than usual sprouts. For example, one grafted tomato sprout costs about $2.00 while a normal one is $1.00. But I believe it's worth paying for them.
The photo shows the one of grafted tomato sprouts I bought. You can see the sprout is "clipped" with a rootstock. Eventually, I bought 6 tomatoes, 4 cucumbers and 3 eggplants which are all grafted, costing about $20!