One option may be to:
1) Download a free GPS program that has a trip counter. Here is a site I have seen in the past;
Free GPS Software - An Up-to-Date List. I know nothing of the site or the programs offered and make no recommendations or warrants regarding them.
2) Download the free software thingy from Laptop GPS World that allows you to run multiple programs off one GPS receiver. [At least I think I remember seeing it offered here.]
3) Run the two GPS programs concurrently to achieve the needed info.
I have had some success with downloading free GPS software. I downloaded a marine application and NOAA charts. Can't wait to go sailing; it's been years... This program was offered out on the net, but when I downloaded the charts, I noticed that NOAA had links to various free programs - of which one was the program I had downloaded.
I look forward to knowing of your solution. I think it would be nice to have, myself.