I know I was just talking to Jordan about these at the Toys for Tots Run.
I bought the 175 lb struts last winter, and Dave and Curt helped me install them. The stock ones were at their end of life; not only during the winter, but also during warmer months, the lift gate would end up hitting me in the head.
Here is a list of the parts I ordered from McMaster-Carr:
9416K79 10 mm Ball Socket, M8 Thread, Steel for, Gas Spring with Threaded Ends
9416K28 Gas Spring with Threaded Ends, 175 Force, 18.18" Extended Length, 7.87" Stroke
4185T12 Gas Spring Seal Protector, for .87" Cylinder Diameter