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I don't know of any on-line data base however the Aunger brand is owned by CoolDrive.
Some interesting info here - including this "CoolDrive is also keen to locate the original moulds for Aunger’s legendary rear window louvre, confident that there would be a strong market for this iconic accessory."
Maybe they have part number records from when they purchased the brand. Can't hurt to ask.
Also interesting that fitting kits are still available.
Agree, a pity to bin them.