20 inch bicycle fork urgently needed for raleigh access folding e-bike

[UA17]

Hi, I crashed my bike. I now need a new 20 inch biycle fork for my raleigh access folding e-bike. Does anyone have one or know where I can get one from? apparently it has to be internally threaded or something like that! (sorry i am not very technical with bikes). I have attached a pictures of my bike.

 

[cwah]

I'm interested too to change my dahon jetstream fork in order to get a second motor on it