Koji, Thank you for the reply.
Being something of a novice with Solr, I would be grateful if you could clarify my next steps.
I infer from your reply that there is no current implementation yet contributed for the FVH similar to the regex fragmenter.
Thus I need to write my own custom extensions of FragmentsBuilder & FragListBuilder interfaces to take in and apply the regex.
I would be happy to contribute back what I create. Appreciate whatever guidance you can offer, Christopher