Can these be customised for indented knobs for recall?
You mentioned inspired, what would be the differences between the original - do you have different curves, frequencies, etc. is the sound quality the-same, or yours is cleaner, low noise?
The EQ250 will be available in 2-3 weeks.
The potentiometers are typical 9mm pots which do exist with detents (11, 21, 41). But they are not standard and you will probably need to purchase a large number.
The main difference with the original is in the use of modern OPA134 and OPA2134 op-amps, allowing the removal of some coupling capacitors. So IMHO same or better sound quality.