we could help with one of these available alternatives for part 448-AUIRS2181STRDKR-ND as
Half-Bridge Gate Driver IC Inverting 8-SOIC from Infineon Technologies, that our customers ordered, but has Product Status: Not For New Designs (NFND) already:
IR2102SPBF as similar IC GATE DRVR HALF-BRIDGE 8SOIC also from Infineon (former International Rectifier) or
L6385ED013TR / 497-6214-6-ND – Digi-Reel® as IC GATE DRVR HALF-BRIDGE 8SO from STMicroelectronics.
Please review the datasheets to ensure the alternative will work for your application.