Glad you solved the issue. Here’s the OEM part on Amazon. I just ordered one and it came in the expected red color. It’s a 5MM ID hose.

Saeco 996530009505 (16000380) 5X8,9 Silicone Tube https://www.amazon.com/dp/B0141UZOPA/ref=cm_sw_r_cp_api_glt_i_S844HXM0YBBRJ7V79F36?_encoding=UTF8&psc=1