Welcome to our new beta design! Click here to go back to the old Newschoolers.
I'm not sure but i think there is no HDPE or UHMW and things like that at home depot and other. I think you need to find a plastic retailer or something like that.
I'm looking for HDPE to cover my rail too. I work less better than UHMW but there is the price
Hope it will help you to find what you want (go to US plactics for prices and to find retailers)