Sales Order Daily Limit?

Hello,

I imagine this isn't a very common issue, and as such I cannot find an answer.

We book in inserts into our weekly newspapers. We have a limit of five available positions for booking for each paper.

Is there a way this could be managed well.

I have toyed with the idea of making multiple products with only a set amount for available stock. But this would mean I have to create a new product for each newspaper. This is lunacy because we have 5 newspapers a week. I don't want to constantly make 5 new products once a week like clockwork.

If anyone has any ideas, let me know. I am open for suggestions.

Thanks in advance,

Adam