Mocks or Virtualization Services for Performance Testing

Hi Friends

I am using Gatling to do perfromance testing to miccroservices.

I have a question about virtualization services.

I have a system with microservices architecture and I need create simulation of services of SOAP web services, but, I have a problem with the concurrency in the mocks for isolated the test over the microservices.

I was using wiremock and citrus framework but do not support the high concurrency.

Sorry if in this forum not is for that¡, but everything help is welcome.