Global IT Hardware Store in iProcurement

Hi,

We have 15 operating units

Each operating unit has an IT hardware procurement incharge.

Now we wish to set up a DELL punchout store, which can be accessed only by these IT hardware procurement incharges in various operating units.

How can we achieve this ?

As iprocurement does not support multi org access control.

For this one store, do we need to create a separate responsibility per operating unit ?

That will be lot of work as we need to create 15 responsibilities which will cater to one person and one store.

Please give suggestions and options.

thx,