Be forwarned that there are the full stainless kits, and the typical ones sold by ATP which are stainless clamps with MS flanges. Nothing bad with them at all just be aware if you’re looking for full stainless. ATP does sell stainless flanges, but it’s cheaper to buy elsewhere as a complete kit.
Synapse will have them locally, although I have no idea what type they are. I never stock those parts so I can’t help you in this case.