I picked up a copy of the parts catalogs from three local dealers. When I need a part I look for it in the catalogs and that provides me with the part manufacturer and the part number. I then google the part and determine who has the best deal. Most times it is Amazon that wins out, generally because of free shipping for prime.
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Dave
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054