STR has a render of their BMW M4 GT4 in team colors (Tap the right hand arrow on the picture):
https://www.instagram.com/p/BbCm3x_H...worldchallenge
Also, looks like Nicolai Elghanayan, who drove a Lotus in TC at Laguna, has a KTM XBow GT4. Could be an ex-Mantella car, based on his other Instagram posts.
https://www.instagram.com/p/BbAECSJA...by=nicolai0912