The VX7805-500-W from CUI Inc. is a linear regulator replacement DC-DC converter with 1 output at 5 V and -5 V, rated 500 mA and 300 mA, with a 36 V input.
The VX7805-1000 from CUI Inc. is a linear regulator replacement DC-DC converter board-mount module with 1 output at 5 V and 1 A, accepting an 8 V to 36 V input.