Specialized Catalog For Charles & Diana Topical Material?

That may seem like an off-the wall topic, but given the topical interest in Charles & Diana material (at least there was at one point), has there ever been a specialized catalog published for some of the more esoteric philatelic material?

For example, imperfs, specimens, inverted watermarks, inverted overprints, doubled overprints, etc.

Scott doesn't list much of it at all, and I don't have access to worldwide Stanley Gibbons catalogs to see if they list the material.

My assumption is that this type of material isn't worth very much (The British Commonwealth's equivalent to sand dunes), but it doesn't hurt to check.

Thanks.

Opinion:
Not seen in my travels.
The general Thematic would be "The Royal Family" and possibly covered by the ATA American Topical Society.

I have seen collections broken up, they garner reasonable interest, they move, but not at great prices, when you consider the discipline of collecting them.
Depending on the expertise of the collector, varieties may / may not be included.

As a Worldwide collector, I often buy thematics, as a cheap way to get
stamps of varying countries for pennies.

I have seen Space, Football, FDR, for sale in the past months, and an SCF member, recently gifted me a Bird thematic, which I break back down to country of issue.

In general, I think thematic collecting, is pure "collecting for enjoyment" status.
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Princess Diana Thematic..Sold $82

https://auction.catawiki.com/kavels...er-on-stamps


British Royal House Collection $27 ($46 shipping)

As Rod says, they go cheap, deservedly so. And one would suspect that some of the "varieties" could well be manufactured along the lines of those of Tuvalu.