A three wheeled War Machine graphic is available for your Scout piece. See my Rose Chess XII page. I plan to use this piece in yet another 10x10 variant next month.
Also Peter S. Hatch's Fantasy Grand Chess (2000) contains the Druid Army, with twenty different units. There is no duplication, even for the pawn-equivalent units. One of these pieces, the Stag [WH], is identical to your Scout. EDIT (next day) Digging deeper into the past, in Mark E Hedden's Ganymede Chess (1999), a Bishop can promote to a Cardinal [BWH].
A three wheeled War Machine graphic is available for your Scout piece. See my Rose Chess XII page. I plan to use this piece in yet another 10x10 variant next month.
Also Peter S. Hatch's Fantasy Grand Chess (2000) contains the Druid Army, with twenty different units. There is no duplication, even for the pawn-equivalent units. One of these pieces, the Stag [WH], is identical to your Scout. EDIT (next day) Digging deeper into the past, in Mark E Hedden's Ganymede Chess (1999), a Bishop can promote to a Cardinal [BWH].