I cannot remember having seen an ARISTO watch in nature, but maybe I just did not notice.
Here in Germay you would most probably find them in the watch department of a department store. (I can speak only about Germany because I no experience how the watch business is organized in your contries.)
A quick internet search shows these watches in a number of mail order shops.
ARISTO seems to specialize in watches that at low cost resemble known archetypes like Pilot's watches, the unmistakable R****-designs but also this special B-watch. ETA 28xx movements are standard in their watches and given the pricing I would assume, that they use the least elaborate versions, which are called "elaboré". Funny, isn't it?
Best regards and read you,
Martin