It was very easy to find the parts I needed at reasonable prices. I will use this website again for grill parts.
Water reservoir - right - for: ecr6600/7
Water reservoir - right - for: ecr6600/7200 & pcrn66/86 series ii (35 1/8") limited stock
Buy this part and as many parts as you like and pay only $9.99 shipping, within the Contiguous United States.