They made the Morello research CPUs, but did not sell them.

The Acorn/Arm history is somewhat complicated due to the Arm IPO, I think.

One can split hairs about the corporate responsibility, but I personally bought a VLSI ARM chip in the 90s. VLSI were one of the original 3 partners (along with Apple and Acorn) who owned the newly formed ARM corp and were the first to produce them (for Apple).