Having trouble finding a single chest roller system for rope walking...sources?

[anymanusa]

Google has been getting worse every passing day, but it may be all me. I can't find hardly anywhere to but a chest rig for a rope walking set up. I've found a few places that will let you "pre order" a double roller PMI system, but I'd rather look at a few "in stock" single roller units. I can't seem to find anything but the actual chest harness itself. I want to look at a few roller systems with a plate.

Please don't direct me to look at the Camp Turbo chest ascender with rollers. That is NOT a chest plate with a roller. I'm tryinig to get the contact point up closer to my top middle chest so that much of my chest weight is supported by the chest plate.

Thanks.