TPT and Unix/Linux Environment Variables

Is there a way, within a TPT module, to accept in OS environment variables?
I am aware of the global variable file (good for all modules) and the local variable file (good for a particular module), but I need to get variables passed in for a specific execution of a module (i.e. the parms values will change with each execution).
I would also like to have a generic script to invoke various TPT modules (so the -u option would change).
Multiload used to have an ACCEPT capability, but I'm not finding such flexibility with TPT.  Right now, we are generating TPT modules from templates, and using awk to replace the variables that we need.
Any/all help appreciated.