My wife bought me a Macro Keyboard for Christmas this year.
It's heavy and feels very solid.
It has 48 keys and 4 modes giving you a total of 192 keys.
I bought some blank keys so I could label them with my own labels.
Then I used a program called Auto Hot Key to really enhance it to do some complex macros.
I use the thing heavily everyday.
If you're looking for a separate keypad that will give you a similar feel as the 5550 console, then check this one out.
Note: the link below is an affiliate link.
https://amzn.to/2L0znH9Ralph