multi-tiered product plugin for ecommerce site

[Orion]

Wow, this week and the unique requests... lol...

This can be using zencart, oscommerce, cubecart or I'm open to another opensource cart solution if it is easily configurable and will do what we want here...

Does anyone know of an existing contribution that will allow us to enter say
10 products with about 70 option each.. each option is a regional version of the product and once purchased will be pulled from inventory.

products are broken down by
country
region
area
district

about 700 unique options/products available at district level
one area level purchase would bemade up of (eg) 10 district level or individual products
on purchase at regional level might include 5 area levels or about 50 district level products

so when someone purchases say a region it would have to pull all the product from the district level so no one can buy it till next period.

same as if someone has district purchased for this period then no one can purchase area or region level for that period and would have to check for availability at a later time.

Not sure if that sounds extremely confusing or not! lol

Any input? ideas on an existing add/on