For all intents and purposes the TVP 'Powerjet' is a suped-up '59 Duo Jet. It is said to have the body chambering of a '55 but that might need to be taken with a pinch of salt. The changes from a standard '59 repro are the TVJ Power'Tron pickups, Sperzel locking tuners, Adjustomatic bridge and straplocks. To change to TVJ T-Armonds you might need them in Filtertron mount (as previously mentioned in this thread). There have been reports that those in the Filtertron mount sound slightly different to those in original Dynasonic mount. I can't comment on that. A used '53VS will probably cost around £2k so maybe a ove your budget? The TVP for sale in Peterborough is only £1,100.