Parts for AI rifles have always been unobtainable within a reasonable timeframe even for brand new current production rifles... Anyone who has owned an AI for longer than a month or ever tried to order a spare part should know this by now, lol. It's been a running joke for 15+ years that your backordered part will arrive "eventually" with no timeframe provided.
I remember waiting 6+ months just for different colored skins for my AT when the AT was less than a year old from the initial release, and 8+ months for different colored plastics and the longer 16" hand guard for my AX when the AX was still the newest and best model in the lineup.
If you think that's bad try ordering spare parts they normally don't like to sell to the consumer like firing pins, firing pin springs, safety levers, etc. No, I don't want to send the entire rifle in for a warranty repair, I just want spare parts for my inventory and can change it myself if needed.
It's an abusive relationship when it comes to anything AI, they hit me because they love me, lol...