I bought Men's Tactical Belt Heavy Duty Webbing Belt Adjustable Military Style Nylon Belts for the top straps and cut them to length. https://www.amazon.com/gp/product/B077D9BCS6/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1
For the bottom straps I used 1" webbing with AustriAlpin Cobra Buckle 7075 Aluminum Quick Release Adjustable TAN499 (1" 25MM). I bought these on this forum but they are available from several sights.
The more I use them the easier they are to tighten. They are not bad but it takes too hands, one to hold the top of the spur steady and one to pull the tag end. The lowers cobra buckles are much easier, probably because of the strap I used.I used the tactical belt for the top too but I don’t like that i can’t tighten it easily. Have you found that as well? Or can you buckle up but then easily tighten it some how?