After much searching I found these on Walmart’s website.
at $73 for a 4 pack that’s cheaper then the $91 from the manufacture and $120 on amazon. 18.25 each does beat my DIY version project cost of $22.7
How long of a row would you need this for? It looks like you still have to buy the wire/string to connect them and I wouldn’t be surprised if they end posts bend inwards if you try to make it real tight or the canes get heavy with fruit. But the price is pretty good for what it is.
In my opinion the raspberries trellis need wires on at least three levels on both sides as not all canes grow on the same pace. Unless you are going to add a vertical wire to each cane this will not help much while plants are still growing. And one more point. Real raspberries never growing as a nice single cane. Sometimes you have to cut the properly located cane and new one grows a whole foot away…
The fiberglass stakes are 7 feet long and will need to be pounded into the ground at least one foot and perhaps two feet for stability, depending on soil. Plus the end stakes will need to be diagonally guyed with wire or struts. Would be interesting to see how much pounding these would take compared to metal posts. Augering a small-diameter hole would help.