Unless it could be installed internally using adapters, a cf to ide or sata, and a sd to cf adapter, probably less than $20 more getting those from ebay.
from this link: http://www.ehow.com/info_12213476_cf-vs-sd-laptop-drive.html
I did learn that CF cards have a controller to allow them to be read as a hard drive. That may be why the CF adapters I saw were about $15, better check that before committing to that solution.
At least CF to IDE or SATA works, hope this helps!