If your wifi worked during your install, use the live CD/USB that you used to do your install to boot "Try wihtout Installing" and configure internet access. Mount your drive so you can have access to your home directory... And download your drivers and dkms and drop them in your Downloads folder(or wherever)... apt-get download dkms is the command to download the dkms package. Then boot back up into your system and you can install like sudo dpkg -i dkms-blah-blah.deb