Everything I've seen says that the display module used in the SB3/Classic and Transporter is no longer being manufactured.
However, that doesn't necessarily indicate a repair problem since there are probably a fair number in reserve for service purposes. The number needed for service is going to be far lower than needed to continue new manufacture.
Just think - you can buy NOS (new old stock) vacuum tubes that are 40, 50 or more years old without too much problem, though some are very pricey due to rarity now.
If you are thinking Transporter, I wouldn't worry too much about this particular issue. (Of course, I have no connection with Logitech so have no way to know for sure.)
However, that doesn't necessarily indicate a repair problem since there are probably a fair number in reserve for service purposes. The number needed for service is going to be far lower than needed to continue new manufacture.
Just think - you can buy NOS (new old stock) vacuum tubes that are 40, 50 or more years old without too much problem, though some are very pricey due to rarity now.
If you are thinking Transporter, I wouldn't worry too much about this particular issue. (Of course, I have no connection with Logitech so have no way to know for sure.)