https://keenovo.store/collections/custom-keenovo-silicone-heaters/products/keenovo-silicone-heater-370mm-x-375mm-for-ender-5-plus-3d-printer-build-plate-heatbed-heating-upgrade (also got the relay from them)
https://www.amazon.com/MEAN-WELL-LRS-200-24-Regulated-Switching/dp/B07DD42L3Y
https://www.amazon.com/dp/B08XQ3CK81/ref=cm_sw_r_cp_api_glt_i_4V709HA6F7338H5RC71D
You’ll need some various connectors, wiring and soldering skills to do a clean install but overall I’m extremely pleased. The only downside I’ve seen is that on initial heat up it heats so damn fast that it overshoots the target temp on the bed and I haven’t been table to tune that out yet but it’s basically an irrelevant problem.