Options on how to proceed?

I'm looking for some advice on how to proceed haven't kept up with SA Tivo's for years. My son has an older Tivo HD (Series 2 I think) that gave out... he's paying $12.95 monthly. I see where I can get an replacement drive from Weaknees for either $130 or $150 which is in his budget TiVo HD Series 3 TCD652160 TiVo Upgrade Kits and Hard Drives

He also has a DirecTV Tivo Thr22 which I thought were now unavailable from DirecTV but I...

Options on how to proceed?

Options on how to proceed?