As per Digikey HMC1052 is obsolete. HMC1052L-TR is proposed as alternative (smaller form factor, MOQ 3kpcs/reel).
Farnell offers HMC1052 under order code 3890144 available with 9 weeks lead time.
Is HM1052L pending obsolete, or just subject to Digikey's product portfolio cleanup?
AMR sensors are handled by Honeywell's Aerospace business unit. That makes it hard to get access to product information in general and official product change notifications in general