I doubt that there will be a tach cable, but the wire that the tach splices into isn't that hard to find, if you know what you're looking for. It's pretty hard to find a dash with a tach in it for a 95 corolla.
The one you were looking at on ebay isn't hard to install, if you know the wire to splice into. A shop would install it for you for around $60-80, but I would recommend doing it yourself. It'll take less than an hour, especially if the tach comes with instructions. If it doesn't, and you still want an aftermarket tach, let me know and I'll take some pictures of the wire that my aftermarket tach is spliced into.
The one you were looking at on ebay isn't hard to install, if you know the wire to splice into. A shop would install it for you for around $60-80, but I would recommend doing it yourself. It'll take less than an hour, especially if the tach comes with instructions. If it doesn't, and you still want an aftermarket tach, let me know and I'll take some pictures of the wire that my aftermarket tach is spliced into.