BVM A Series BKM-68X has been listed (Patreon)

Sony BKM-68X RGB Analogue Component Input Adaptor Card for CRT A BVM A20 A24 A32 | eBay

This card is the only available way of using RGB and YPbPr component analogue signals from 240p/480i, 480p, 720p, to 1080i on these monitors. This will be an interesting chance to see market price discovery for one of these in 2021.