Hey everyone I'm sure this has been done before, sorry

But I want to do fake flowers for bouquets and decorations and centerpieces.
I have some from Michaels for my own bouquet, but their prices are a bit high to get as many as I need.
Any advice on where to get good prices or buy in bulk?
I'm also looking for mason jars to put stems in on the tables.
Any help is much appreciated!