Not sure how much you're lifting but I've used some square rubber pads that I picked up from homebase, possibly these (http://www.homebase.co.uk/en/homebaseuk/granuflex-rubber-tile---green---500-x-500mm-683816) and I'v dropped 200kg on them without issues.
Something to consider as a significantly cheaper option especially if you've got rubber mats down underneath as well.
Something to consider as a significantly cheaper option especially if you've got rubber mats down underneath as well.