Are the original cyanogen downloads for old devices still available?
From the source listed below, there were backups made at archive.com of snapshots and nightly builds of CyanogenMod. There are many models, but I am not sure about yours.

Snapshots: https://archive.org/details/cmarchive_snapshots OR https://archive.org/download/cmarchive_nighlies
Nightlies: https://archive.org/details/cmarchive_nighlies OR https://archive.org/download/cmarchive_nighlies

Source: Complete CM Snapshots and Nightlies archive (xpost from /r/android)