is it possible to run just the model packaging step in sagemaker pipeline?

I have set up few steps in sagemaker pipeline , to process and train data. but in the event where i need a custom script for inference , i want to able to just run the model re-packaging step. is it possible to just run this step in the pipeline? if not, are there any other alternatives to do model packaging via lambda or something similar ? also, is it possible to view , which tool or script does sagemaker uses to package the model. is it possible to use the same tool outside the sagemaker?