Ralley wheel Trim ring Help

Two types of trim rings,15x7 & 15x6.5 for the 15" series.The 6.5 will fit the 7" rims and leave a gap,the 15x7 will go on the 6.5 rims but do not seat and lock and fly off at speed.I found a ebay seller that sells the rings out of california,I will find the name of the company,Mrmopartech