serpentine belt tensioner

hello
anybody knows the part number and manufacturer of s.belt tensioner
because here I dont have any possibilities to get parts I'll try to find it
by other car brands if there is other car using it I searched popular car part sites never mention about this part

I hope there is an equalient thanks

buy it from st. charles isuzu. see my faq link below:

thanks for reply but I live in turkey its not possible to buy it by st charles from here
I need to use another car brand may be a frontera but Idont know if its
interchangeable with isuzu