Hi Vino
Yes the chain apperas to be 7/8" and is manufactured by OCM (ORIENTAL CHAIN MFG.CO.,LTD)
It appears to be the 4H63 chain (http://www.ocm.co.jp/en/pro/extra_h_d/index.html)
The web site lists a number of American dealers. I will email one and see what I can do.
I also emailed an...