Your question is complicated because the 810 LED is a 4 wire device.
The 810 is an analog unit. Its four wires are
red - battery power
black - ground
blue - connects to battery to start controller
green - shows three voltage levels and each level signals a different PAS level to a compatible controller.
1 Volt PAS1
2 Volts PAS2
3 Volts PAS3
4 Volts 6km walk mode
However, I have an ebikeling kit from 2015 (500W geared motor) and I found that the 810 LED unit in that kit had a 5 wire cable, but the 5th wire didn't come out of the cable. Only the above 4 wires do. I found this out when I was shortening the cable and found it had 5 wires inside.
Your controller doesn't look to me to support the 810, nor does it appear to have pedal assist. I don't see much on ebay either.
BMSBattery has a suitable model for $25
, but shipping is crazy at $38. I have bought motors and controllers from BMSBattery. They do ship fast. Add $6 and you get the 810LED display and you know it will fit/work.
For about $41, you can get a controller/display from this aliexpress vendor.
, I bought a similar controller from them. It worked, but I thought it was too weak. In addition, there was no documentation and took a lot of figuring out. Lot of figuring just to navigate their web page and figure out what to order too,
The BMS battery model would be my choice.
Edit: ELifebike used to sell a controller compatible with the 810LED on ebay for $20 shipped. They changed their name to pswpower and have a website at pswpower.com. While none of them ar 810 compatible, you could get a new unit plus LED display for around $35 and $30 shipping to the USA.