The Noxary XRF is a case replacement for the Realforce R1, a TKL keyboard designed & produced by Topre. You will be able to take the internals of your Realforce, and swap out the plastic case for an all metal enclosure. This is compatible with the 86u, 87u, 88u, and 89u, however the Winkeyless option will require full disassembly to remove two housings on the bottom row.
XRF (2019) was released on October 28th 2019 - 50 units were sold. XRF (2019) - Polycarbonate was sold as in-stock on February 1st 2021 - 8 units were available.