There are a bunch of places where you can buy mobile traffic such as Ross above who can sell you targeted specifically to a couple of good quality sites.
We also sell it where you can target by geo, OS, device, carrier, niche and time. You can buy banners on sites - we have 14bn ads a month for sale globally and you can also purchase redirects from our redirect network with the same targeting capabilities.
You can check out many threads to gauge quality but our advertiser retention rate is well in excess of 80% so hopefully youll find a price that works for you and get some volume to your programs.
Assuming you are US based hit up
[email protected] as he heads up our US offices.
Cheers
Ben