ProSites - set defaults for free level

Hi There,
I am trying to do "staggered" quotas for my packages, wherby free users get 1 page, level 1 users get 2 pages and all other users (level 2 and 3 in my case) get unlimited.

I have set up my 2 page limited to be lifted on level 2 (So level 1 has the quota), But I want to add an additionaly limit for free sites.

Is there a way I can achieve this - perhaps a quick MU plugin with an if statement, checking the users level and then setting a rule for the quotas - are there hooks in ProSites that could achieve this?

Ideally it would be great to add in a pricing table to show this also, but that's not 100% necessary right now