Pin hole Radiator leak

My Mechanic found a small pin hole leak in the Radiator, that's why my dashboard light came on recently, saying, "Add Coolant!"

His recommendation was to pay his shop about $1,200.00 to replace the radiator.

My question is, is there a liquid repair that you'd recommend for my vehicle that would get me to the summer months, to be able to pay that amount for the repair?

Thanks,

Rev. Mike