I believe OEM plastic body work is perfect....why don't you pay little more to take used OEM set, and repaint it...Or you can go Japan used body work..
This bodywork is what I bought brand new from Japan...fitment is perfect..

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1996 HONDA RS250
1995 MC28 NSR250 SE red/white/green
1994 MC28 NSR250 sp W/ RS250 engine