Saw a spanner wrench on another forum by Stockton Tool company that works in tight space but the connection for a 3/8" ratchet is sloppy. The guy actually welded to an old ratchet to make it work. Cycle gear sells it with mixed reviews due to sloppy fit to wrench. Here is the cycle gear web page: https://www.cyclegear.com/eng/product/stockton_tool_company_compact_spanner_wrench/web1006919
Looked on line and found some similar ones
This on at motorcycle-superstore looks like the same thing with different name. No reviews on their page.
This one at motorcycle-superstore would work the same. Only one review that is not positive because it bent when used.
Definitely the right idea if someone makes it of good quality and strength.