https://www.amazon.com/dp/B07XBM24HN/ I got this 1, and it is working great. I just have to scrub it good with hot soapy water periodically.
This is the 1 I am currently using and you can always go this route to refresh whatever build plate you have if you want.
I ordered this one from amazon:
https://www.amazon.com/gp/product/B07XBM24HN?th=1
I had a Monoprice Ultimate Maker before and would run into all sorts of problems with the glass bed I added to it. Honestly the glass bed on the Ender3v2 was working great, but being able to flex it a bit and pop the prints off seems like it will be magic,
https://www.amazon.com/dp/B07XBM24HN/ I got this for mine and it's working nicely, borosilicate glass might help though if the heated bed is super warped.
I use this one: PEI Magnetic Flexible Heated Bed 235x235mm for Ender 3/ Ender 3 V2/ Ender 3 Pro/Ender 3 Prox/Ender 5/ Ender 5 Pro https://www.amazon.com/dp/B07XBM24HN/ref=cm_sw_r_apan_glt_fabc_GEQCSPH81SJGVNNGJJZ0
They all function pretty similar so there isn't a reason to overpay for them. I use the magnetic version so I don't have to worry about clips.
I just upgraded to this and it's awesome. https://www.amazon.com/dp/B07XBM24HN/