Selling On Order Items

Hi,
One of my customers wants to be able to take orders on items up to the number of items currently on order (i.e. sell stock and then take pre-orders we think we can fulfill in a reasonable time frame.)

For expediency what I've done is created a new location and done an inventory adjustment to create phantom inventory in that location equal to the on order quantities.

I did realize I was creating a mess but at least sales are happening.

I am wondering if anyone has advice on a better way to do this. Right now we have $100k of "inventory" that's still in transit. I'm thinking now I should have just received the PO's into the phantom inventory location. We'd still show too high an inventory amount but at least that would correct when we receive the POs and the COGS accounts would be right.