No official second-source or cross-reference is published by the manufacturer.
The Dubox™ series offers the same 11.04 mm stack height and 0.100" pitch in 22-position (71991-311LF), 24-position (71991-312LF), and 26-position (71991-313LF) variants — all with identical gold plating and through-hole termination. If the BOM requires more I/O, the 22-position version is a direct drop-in for the same footprint width, while the 24- and 26-position versions widen the board layout.
