Option to use batch process to complete index, not just to rebuild it

I'm currently working with a large database of items where rebuilding the entire index takes several hours using the lucene api batch function.

After importing new items, or when the batch process has failed for whatever reason, I'm sometimes left with something like "70% indexed". In that case I would like to be able to restart the batch process to index the remaining items without having to start all over again. Neither 'Re-index' nor 'Wipe index' seem to do this. So I would like to request a third option such as 'Index remaining items via Batch API'.