Tubes are 100% the same as rasters, it's everything else that is different. The Amp rebuilds are all done using tubes gathered from TVs.
Like I said, a repair is probably the easiest, but head to KLOV and read up, they can likely answer your questions better than I can. Although I own 9 vector monitors (3 Amps) I've done very, very limited repairs on them, the true experts, and the ones who helped me through those repairs are on KLOV.