I'm looking for ideas on how to manage an inventory that's split between on line and offsite.

I'm selling tickets to an event. For each show, we sell 300 general admission tickets. I have each showtime as a product, and stock 300 units.

We also have a store that sells tickets for us. For each show, I give them 100 tickets and remove 100 from our online inventory since their sales aren't deducted from our inventory in real time.

I made some edits so that when the outlet logs in, they can enter their daily sales without deducting from the online inventory. I then manually add their unsold tickets back to our online inventory when I take them back.

The problem is that when our inventory is low or showing as sold out, they can't enter their orders. I can probably fix this for low stock by skipping the stock check if they're logged in as the outlet, but I hesitate to remove the 'Sold Out' banner because it'll be confusing for regular customers.

I'm open to suggestions of better ways to do this - setting up a duplicate site, using attributes to create different products, enable some products to be only viewable to a particular Zone, etc. Anyone have any ideas?

TIA,
Carl