Wal-mart has the Everyday Essential bumpers singles and sets back in stock and discounted for certain weights ($1.50lb), in particular:
https://www.walmart.com/ip/seort/645785857
https://www.walmart.com/ip/seort/166337921
15lb - $22.50
25lb - $37.50
35lb - $52.50
45lb - $67.50
55lb - $82.50
160lb - $240
210lb - $315
260lb - $390
-------------------
370lb - $550
https://www.walmart.com/ip/seort/645785857
https://www.walmart.com/ip/seort/645785857
https://www.walmart.com/ip/seort/166337921
15lb - $22.50
25lb - $37.50
35lb - $52.50
45lb - $67.50
55lb - $82.50
160lb - $240
210lb - $315
260lb - $390
-------------------
370lb - $550
https://www.walmart.com/ip/seort/645785857