I just ordered three of these:
https://www.aliexpress.com/item/Free...2a504c4dUle4Ge
You get a discount for every extra one you buy. Yes. It is coming on a slow boat from China, But it will get here, some day.
Also I still have these nice LaserBoy Correction Amp Kits available:
http://laserboy.org/forum/index.php?topic=561.0
They are $40 USD plus shipping.
You won't find a better kit anywhere. The circuit board is copper clad on only one side for super easy assembly. There is a substantial ground plane. All of the traces are as thick as possible. It even has 5v zener diodes to impose an absolute maximum voltage on the color channels, so no way to send 7+ volts to your laser mod inputs.
James.