I just randomly ran across this rack on eBay:
https://www.ebay.com/itm/185374664552?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=QDZIt17eSGC&sssrc=2349624&ssuid=_aCuCxApQ1y&var=&widget_ver=artemis&media=COPY
Looks like it might fit your bill? To be clear, I have no experience with the rack...