Gerbs and colour pots.

For the past week while I have been stuck in isolation I have been thinking about constructing some set pieces, I was rereading my copy of "Westech fireworks manual" and now I need to find a supplier who stocks the following:-
Multi effect open ended gerbs.
Gold gerbs.
Silver gerbs.
Silver to green gerbs.
And colour pots.

Ideally the gerbs should last for 45 to 60 seconds. Any information would be a great help.