Feel free to pm me if you'd like to hear more, I'll keep this post a little shorter then usual.
Hey there...first off, where are you located? If you are in germany and dont mind used boards you can easily find vintage cherry boards.
ASs for the g80-1800 the common ones are MX Black, with the rare old AT models using blues. There were a few small series for the asian market with browns, reds, blues, but those are hard to find. According to a post of a member,that wrote cherry, they are planning to sell an iso variant 1800 with browns at some unspecified point in the future. As far as I'm concerned, that might be years.
A good start would be some used cherry boards with blacks or blues.
A different option, using mx blacks, as well as added programmable function keys would be a Tipro Cashiers Keyboard, these go for 59.99 on ebay.de.
I use a g80-1800 with blacks myself and am enjoying it a lot. For long typing sessions I usually get out a g80-3000 with blues for comfort.