Alternative belts for work sharp

[HntnFsh]

The Red Labels are about $16 including shipping for 10 belts on their site. The Red Label belts may have better abrasives. Not sure.
This is a way better deal!
https://www.amazon.com/Sackorange-Sharpener-Sanding-Coarse-Medium/dp/B07L6VBN2J/ref=pd_sbs_6/146-0699236-0806868?pd_rd_w=UeGUH&pf_rd_p=0a3ad226-8a77-4898-9a99-63ffeb1aef90&pf_rd_r=V8A3EB4DEGMDJN59Q3JT&pd_rd_r=9f4c795c-ab06-44ad-91c0-80bf1b987739&pd_rd_wg=ROwZ6&pd_rd_i=B07L6VBN2J&th=1

[CP]

My machine came with P80, P220, and 6000 grits.  I don’t think that I’ve ever used the P80, rarely use the P220. 

I’d like to find a set with grits between 1000-6000