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Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Package Contents: 1x Chest Band, 1x Headband, 1x Wristband, 2x Bases, 1x Storage Bag, 4x 3M Adhesive, 1x Helmet Strap, 1x Selfie Camera Monopod Stick, 1x Remote Controller Wrist Band, 2x Movable Base, 4x Long Screw, 1x Float Stick, 1x Fixed Strap
Price history and price alert
Here is price history (for all/most countries) for 23x AT435 Accessories for Action Camera.
Price records source(s): Gearbest
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You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).