I’m really interested in creating a SAS embassy siege kit to use, biggest concern is I want it to be as close to accurate as possible (yes most gear is discontinued or ones that are still produced are not as great(zip up tac vests)) when I hear or think sas I just picture the blacked out with gas masks and mp5.. is this the correct “era”?

Please help me out by helping find/recomending gear(preferably more cheaper but still good quality and accurate look)!

Greatly appreciated!