Hi LarryO,
Welcome to Laptop GPS World.
I think I'll give you a link to a manufacturer of excellent vehicle mounts for laptops, before I give you a link to a place to buy a new USB GPS receiver .
Here it is:
RAM Mounting Systems, Inc.
RAM is well known, but there are others, too. A RAM laptop mount may set you back $200, but it is well worth it. If you are looking for a less expensive solution, just search the web for
"laptop vehicle mount", and you will find various products.
The USB GPS receiver that you broke is made by Pharos. I'm not even sure if it is at all possible to purchase it without Streets & Trips software. (Pharos has a website that is too difficult for me to navigate.)
The Pharos made USB GPS receiver, GPS-500, has suffered similar faith in the hands of many users. You may be better off buying something that is a bit physically stronger.
There are many choices, starting from as low as $35: GlobalSat BU-353, Navisys GR-300, Deluo Navstick, etc, etc, etc. Or you could get a BlueTooth GPS receiver, and avoid the unit being attached to your laptop at all.