Wierd Request: Old Shimano 12spd Cassettes


I Get Jokes
.... but not really the whole cassette. If anyone is replacing their cassette and can save me the 10 & 12 tooth cogs that'd be greatly appreciated.

Why? Because we've already maxed the chainring size on my wife's bikes and she still spends 90% of her time in those last two cogs, which consequently causes them to wear out frequently. Since most normal human beings typically use those less frequently, i'm hoping to extend the life of our cassettes by just swapping those out more periodically.
Assuming it's either a 34t or 36t chainring and Serena is only using the 12t or 10t 90% of time?

I'm ok with being normal running 34/19 on the SS 90% of the time.
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