Unless someone can find a money tree with about $1 million, or unless seasonal ridership on the C&TS exceeds about 65,000 riders (up from about 30,000 last season), don't hold your breath waiting for a rebuild.
However, if the only requirement to return 497 to service were to rebuild the boiler in compliance with the FRA Part 230 form 4 rules, the price would be lower, but
all that will be for John Bush to determine -- as would any evaluation of the alternative of replacing 497's suspect boiler with 492's boiler. Nice to have John back.