Ralph Ratcliffe Models has released a 1/87 scale 3T22 and a revamped 1/87 scale STH-10. Both models now feature rounded out ends of the horns to give them a somewhat hollow look. The horns of the old STH-10 were solid and you'd have to take a Dremel tool to hollow them out.
An SD-10 is planned somewhere down the line, according to Ralph.