We still have practical stocks of now vanishingly rare CRT type (tube) TVs. We often specially modify these to accept a composite video input which gives much better picture quality compared to using a modulator into the aerial socket. Please note that any patterning & dark bars showing on the screens in the photographs is not really there & is due to interraction between the screen refresh rate & the camera shutter speed used.
Please note that by default the screens of CRT type TVs are likely to flicker or show roll bars when filmed unless special measures are taken. You REALLY REALLY need a Director Of Photography who is aware of the technicalities involved if you don't want to waste time & footage both on set & in post production. We will not refund hires where assumptions have been made that filming CRTs is a doddle.