Welcome to the forum!
(From another single dad.)
where can i get one of these
You gotta learn computer tricks. Don't tell anyone about this one; it's a secret.
Right-click on the image, select Properties, click on Location to highlight it and scroll to the right until you see something that looks like a model number or something that identifies the image; in this case, ELS2A.
Now, just do a Google search to check it out, maybe at the manufacturer's site, or use a web pricing tool, like the Google one that used to be called
Froogle (as in frugal.) You can sort by 'Price: low to high' to cut to the chase.
I see it for as low as $12.14 (but don't forget to consider shipping). Also, don't forget to check out eBay. I only found two using "line splitter", neither one this cheap. Generally, the simpler the search terms, the greater the results.