Old Bike Engines 125cc Area Older The Better (Ingrow BD21)

I'm looking for old bikes, engines, and projects that anyone has laid around, in sheds, barns, etc.
Any conditions considered, 1980s to '90s, the earlier the better.
Frames also considered, as I'm trying to rebuild a 1980s trials bike, for the roads.
Can you help with this request?
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