Concatenate duplicates + delete + more steps

I have 2 columns of data with 7,000 rows that I am trying to manipulate in the following way. The first column contains a list of car manufacturers (not really my example, but involves the same concept). The second column contains a list of different models of cars. For instance,

Ford | Taurus
Chevrolet | Avalanche
Saturn | Sky
Ford | Explorer
Honda | Accord
Ford | Taurus

What I want is a list of 2 columns with UNIQUE car manufacturers in first column with a list of UNIQUE car models (comma delimited) in second column. So for this example, the first row could read " Ford | Taurus,Explorer". I don't want Taurus to appear twice. I got a lot of help from JBeaucaire from this post. I just can't add the ability to remove car models from the list also. Thanks in advance for all the help!