Here were the steps for me:
I got some printed from here:
This was for the HP Reverb G1 (not the G2), so it’s not something WIDMOvr etc do anymore. It cost about $10, with postage. They looked like this, and was an easy process to get done:
My good friend @Fridge also sent a bunch my way too (across all of Canada as well). I actually prefer them, as he sent three versions and the thicker plastic feels better:
You can see the round lens put in (with the important orientation / which side sticker I put it).
The lens where from Zenni Optical, and were the 41mm ones here. They came to about $10, although if you have a high prescription or astigmatism, then factor in about $20 more.
So how to make them is just take them out of the Zenni frames and click them into the 3D print. One thing I do wish I did better was mark the orientation of the lens before taking them out of the frame. Because I screwed that up I had to pop into a local opticians and ask them to measure the Axis value again, which wasn’t ideal. They didn’t mind but it was a bit cheeky. If anyone does plan to do this, then I recommend watching this before taking the lens out and marking them up.
So considering I had no options for the Reverb G1, and it cost about $30, pretty good. It was interesting to play around with as well.