Seeking Reliable Public Addresses or Open-Source Code for USDC, USDT, and Fireblocks Integration on Avalanche Fuji or Matic Amoy

I’m working on a project involving USDC and USDT, integrated with Fireblocks. Initially, for testing, we used Polygon Mumbai, but it’s deprecated now. Considering migrating to Avalanche Fuji or Matic Amoy. The challenge is deploying these contracts on either chain or finding reliable public addresses for existing deployments.

Are there any known public addresses for these contracts, or is there reliable open-source code available for direct use? Writing from scratch isn’t feasible due to the current development stage and the fact that we didn’t need to develop these contracts when using Polygon Mumbai. Any guidance or suggestions would be greatly appreciated.