Dear PW's

I am looking for 165R13, 6PR tyres for my Probox but i am unable to find them of any make from the tyre shops in G8, Aabpara, Pindi saddar etc. They are recommending to put on normal 175/70/R13 tyres but i believe it is not good for heavy loads. Does anyone knows where to get new or good condition used tyres for Probox?

Regards,

Muhammad Usman