Apologies in advance if this upsets 1850 fans!
Sprint subframes are basically 1850 frames with additional brackets welded on. I have a drawing for these brackets and the company that have recently made the press tools for me can laser cut a quantity of them within their minimum charge. The panel man can bend 4 mm steel and weld fabricate the components; there is a stiffener behind each, so theoretically I could create a supply.
There is interest from one gent on the Facebook group, is there any here?