Optical zoom in OG/v3/v4 cam

I can still find it on Amazon Canada (for how much longer?) but the price is the same as a V4. I found it unconvincing to pay the same $35 USD for the old OG telephoto lens compared to the V4. Of course, I ended up ordering it simply for its functionality, but I was trying to find an alternative solution that might work, assuming that telephoto lenses are no longer available from any reseller.