Slide rule for converting hardness values

I have a slide rule-type thing for converting hardness values (Rockwell, Vickers, Brinell, etc.) which I got as a giveaway at a trade
show a few years ago. It's one of my prized posessions, but, since I use it a lot, it's starting to fall apart.
I'd like to get a new one (and possibly some extras for my friends). I contacted the company I got it from at the trade show, and they said they'd send me a new one, but they sent me a tolerance slide instead. The customer service person didn't seem to know the difference.
Does anybody know where I can get one (or more) of these?
Thanks,
Dave Palmer
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If you can take it apart - 'xerox' all scales - just in case you have to make a new one. The copies can be laminated in plastic.....
Martin
Martin Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net NRA LOH & Endowment Member NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member
snipped-for-privacy@gmail.com wrote:

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