Computer Store that still sells Win7Pro laptops that are 17"

I'm trying to find one of the laptops that are Win7Prox32 that are 17" versus that new Win8.

I understand Ican downgrade when I buy the laptop, but for some reason (I've tried on my current laptop) when I install win7prox64 on my former Win8 laptop, there are little lags here and there - I don't know if it is because the hardware is just not compatible with the older OS.

I'm looking for a business laptop, HP Probook, or Lenovo brand.

Please let me know where I should be looking, becaues I tried Canada Computers, NCIX, TigerDirect, Infonec, all without any success.

Thanks.