Clone Crankshaft

#1
I have a Lifan 5.5hp engine that I bought as a new open box unit for $15. My brother put oil in it and it started up in less than 1 full pull. Awesome. Anyway, it has a tapered crankshaft, and I was wondering if there is a source for cheap interneral replacement parts, like a 3/4" keyed shaft for it.
Any help would be greatly appreciated! thanks!
 
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