For a rack and bench, I don't know, but the bar and bumpers, yup, I gotcha. If you're only using bumper weights, you might not need the stall mats.

I have this barbell. Works just fine. Doesn't have a center knurl, if that matters to ya. https://www.amazon.com/CAP-Barbell-Olympic-1000-Pound-Capacity/dp/B001K4OPY2

I went with these bumper plates, which have held up well. $80 for a 45 lb, shipped; they were the cheapest I found, as well. https://www.amazon.com/Black-Bumper-Plate-Rubber-Insert/dp/B00I18FGL6