There was another thread about this recently - maybe on the Solstice forum. Yes they seem to be unobtainium for the moment. Pretty sure it's just a manufacturing issue and they'll come back. Perhaps you could call Curt/Draw-hitch customer service and ask?I also checked. Out of stock. Seems to be out of stock everywhere.
|24833||Draw-Tite Sportframe Trailer Hitch Receiver - Custom Fit - Class I - 1-1/4"|
The DDM brace (ProBeam) attaches to and stiffens the lower suspension pickups, not the frame, so there is no similarity. The trailer hitch is really only going to function as a trailer hitch.... I think having the hitch increases rear-end crash penetration. I assume it also stiffens the frame, sort-of like the DDM rear brace does. Likely not as well, but some improvement is better than no improvement. .....