Sorry the ones in our scrap bin are the older 70's era covers.
that looks like a 150A 20/30 panel cover probably available still.
Yes, anything using QOM1, QOM2 main breakers has fairly good chance of having a currently used cover that will fit.
Covers for QO have separate catalog number and if you purchase from a supply house usually will need to order the cover separately as you can get flush or surface style. Panels sold in big box stores usually have a flush cover included in the package.
Looks like currently made covers with QOM2 main only go as little as 30 space,(QOC30UF) so maybe this one was discontinued. Is possible the 30 space might still fit with little modification - would be my first thing to try.