Same thing happened to me. I found it on Google but when I went back later on Lowes.com I couldn't find it. Try this link:
Part #317711
Model #HU625WT
I live way out in the country so I ended up calling the Lowes Corporate Sales: 800.445-6937, option 4, then option 3.
The agent found the nearest Lowes that had the thing in stock. (They stock up at the beginning of the season and sell out; no restocking.) I paid on the phone and plan to pick up my new awesome machine next Tuesday. (YAY!)
Good luck.
Hi, James
Thanks for contacting the Answer Army to post your questions.
We do manufacture a wheeled trimmer unit by Weedeater.
Thanks again from the Husqvarna Technical Services Team.