Spare link for chain
 

I see that there is not a master link for my chain, but I would like to know what the part number is for a replacement/emergency quick link. (In case of possible breakage.) Please help.

Don't bother. If the chain breaks while riding you likely wouldn't have enough tools on hand to do the repair.
Chains are strong and will wear out before breaking providing there are no flaws in the metal or in the actual construction of the chain.