Its sad when people leave, especially if they are half way through a funny first time grow and you really want to see what happeneds with their plants... but then they just never come back! lol
So for your question... I have no idea where to get a clone, I just buy seeds... Pros and cons...
you can pick your own mother with seeds
you never have to worry about getting a pest from a seed(clones can harbour pests that will ruin everything)
you have way more selection with seeds, you can go online and browse throught thousands of options. If you have a dispensary near you with clones I doubt they will have thousands of options for you to choose from.
only bad part is you have to germinate the things and then grow the plants long enough to identify the males
I recommend getting seeds
As for strain you should describe your priorities a little more, high? potency? yeild? easy to growness? stretch factor? short flower?