I have a Yaesu CT-175 it is also 6pin to 10 pin din. It is the HRI-200 specified cable I believe the cable designations are identical. I used it to try linking a DINAH to a DR2X Yaesu repeater and found it only works 1/2 duplex. (as transcievers like a FTM-300DR is 1/2 duplex.)
It's for sale. I paid $29.95 plus shipping. I ship it to you for that same $29.95. Contact me w8lm at arrl dot net
Larry Macionski