Brushcutters

i am looking to buy a Husqvarna 326LS and a blade attachment for some very think brush i have. this trimmer doesn't come with a harness nor an attachment point for a harness. My dealer says since there isn't an attachment point that one cannot be added. Is this true? If i can add one, what are the parts i need to do so? He was trying to sale me the 535ls right out of the gate. That is more than i have to spend. i was also looking for a u-handle for best ergonomics and he also talked me out of that saying it inst needed. they don't keep them in stock by the way.