Thank you Andrew.
Indeed by typing the research in english, it provides with few vendors
Regarding your question "How long is it", I need to remove the front wheel to measure, yet it is the default Quick release I got with my Silvio.
For sure it is longer than the standard 160mm...I would say at least 200mm...
In case the 210mm is not yet the proper length, then it means I must rely on CRUZBIKE for spare part.
I can not imagine that this prticular QR skewer is proprietary to Cruzbike. There are many different options in length dependent upon the application. Perhaps look into skewers for tandem bicycles; the rear hubs on a tandem is wider than it's single road bike counterpart.