Sorry KeKeMaN! I am not sure about this. 
The manufacture of Strida 1 stopped almost 20 years ago so I don鈥檛 know whether the distributor still keeps those parts. However, the manufacture of Strida 3 just stopped at the end of February of this year so I think the distributor/manufacturer may still have the parts.
Here are some pictures showing the missing parts:
Large round-shaped reflectors on the spokes of the wheels of Strida 1
Smaller round-shaped reflectors on the spokes of the wheels of the plastic-wheeled Strida 3
Close-up pictures of the kickstand on Strida 1