Like everything these days, they may come in/out of stock. Both seem to be in stock at my local aussie store. So, just keep checking and maybe ask Oculus support to see if they can give you any further info.
Also, just curious, but why have you needed controller replacements so soon?
9 9900k, rtx3090, 32 Gb ram, 1tb ssd, 4tb hdd. xi hero wifi mb, Corsair 1000w. Rift cv1, Quest 1, Vive Pro.