The Crosti is indeed a hit and I think that bodes well for a version for the rebuilt version.
If Hornby choose to release a rebuilt Crosti, then it may well be the last piece to complete the jigsaw picture for the mid-sixties steam modeller, in that every class of steam loco in service during the period is available to an accurate standard RTR.
1967 and 1968 are covered,and may apply over a wider period, How do the years 1964 1965, 1966 etc, fare against the RTR criteria?