I have one similar to the 15036 TE from that site; a 3NC NS-468, but it tests RJ45 and RJ11, rather than RJ45+coax. You can find them listed on eBay, where I got this one as part of a kit including an RJ45 crimp tool and bunch of RJ45 plugs.
I modified mine to have a fast strobe, and added a hold button.
