KPrepublic thank you for the reply. I hope you won't be breaking the rules by posting a link to your site, because this is exactly what I was hoping for when I posted this thread. I found your website, and saw the photo of the keycaps, unfortunately the keycaps shown at the link you provided have the 3 strut construction as I have shown in my first post above. Do all OEM PBT keycaps on your website have the same construction as the ones shown in the link you provided? I would like to use o-rings and I have found that keycaps with 3 struts slightly wobble and tilt when bottoming out when used with o-rings. Unlike our preference for keycaps profile I think people all over the place have expressed their opinion loud and clear on their lack of interest for backlighting, yet again and again this is exactly what most manufacturers keep making, and this 3-struts construction seems to be the unfortunate outcome of it.
Deefenestrate I just checked Originative website again, and you are right, some are indeed PBT, but unfortunately with Cherry profile.