Personally, I really like the files that Great Ape Studios put out. Darren put a ton of time and effort into getting them really close to the actual props, and it shows. He's taken feedback from the community as well and made some tweaks along the way too. His etsy shop is here:
https://www.etsy.com/shop/GreatApeStudioArt?ref=simple-shop-header-name&listing_id=773669193He does have some of the files separate from the bundle if you're after just the hand guards for example.
Cloak is a dark grey boiled wool. The lighting in the show varies a ton from episode to episode but I believe the crl has it as a dark grey for both S1V1 and Beskar. Boiled wool can be expensive to source, so something that looks similar is allowed.
For the rest, here's some recommendations, the typical "Luke isn't at fault for anything" disclaimer applies here too.
Boots: Crow Props (
https://crowprops.bigcartel.com/) makes a pretty close reproduction of the boots, or you can find the Sketchers and cover them in leather like the show did for the super accurate look.
Gloves: Endor Finders (
https://www.endorfinders.com/) has done gloves for a bunch of Legion costumes and come with velcro ready to go.
Leather Parts: One of the most expensive aspects to this costume I think. There's a few places making these, Sines Industries (
https://www.etsy.com/shop/SinesIndustries?ref=nla_listing_details) has made 100s of them now, and includes a lot of the metal parts in their builds as well. When they have open slots for their runs they'll have them on their shop. Usually 1-2 months I believe.
Flight Suit, Vest, Cumberbund, etc: Lots of makers on the market now. Some folks get the CosplaySky suit from China and take off the cheap vinyl armor and dye it to the correct color. For something a little nicer, Leather Fashion Valley (
https://www.leatherfashionvalley.com/star-wars/the-mandalorian-beskar-v2-flight-suit), Magnoli Clothiers
https://www.magnoliclothiers.com/mando-outfit-other-garments-p-964.html and The Darkside Closet (
https://www.facebook.com/TheDarkSideCloset) are all pretty good options.
There are patterns out there for sale as well if you want to save a bunch of cash and have someone sew it for you.
Optional Items:
Pistol: Lots of people 3d printing or using the Rubies toy blaster. A full aluminum one is SUPER nice if you want to spend that stimulus money ASAP.
Rifle: Only option is 3d printed right now. We might get someone making a resin/metal one eventually but hard to say.
Knife: Can be 3d printed, but having a rubber one that's con safe would be nice. JSC Props makes one: (
https://jscprops.com/collections/mandalorian/products/din-djarins-vibroblade-kit-v2?variant=36466240159910). He also makes a nice MandoPuter that goes in the gauntlet.