1979 PE 250 side covers.
are RM A/B/C/C2 sidecovers. (250,370,400C) try, oh, Vintage Suzuki, DC Plastics, or give Les at Mainly Maico a call, as I think he might have them. Prix-historic did them in fibreglass, but what the hey, the correct ones are still readily available from SUZUKI (eg Ray at SuzukiParts in South Australia) if you want NOS.