Sliding bevels can be had on as easy as wink and I have been testing them out for a while. I pretty much know which ones work well but I wanted some up to date info on ones available.
Bahco Sliding Bevels Keep on Sliding After Lockdown - Paul Sellers
Buying Good Tools Cheap - Sliding Bevel - Paul Sellers' Blog
Accidental Woodworker: sliding T-bevel
Accidental Woodworker: sliding T-bevel
Sliding Bevel, Buying Guide
Since March 2021 I've Made . . . - Paul Sellers' Blog
Accidental Woodworker: sliding T-bevel
Since March 2021 I've Made . . . - Paul Sellers' Blog
Prepping Wood Part I Intro - Paul Sellers' Blog
My Workbenches - Paul Sellers' Blog
Sliding Bevel, Buying Guide
Accidental Woodworker: sliding T-bevel
What's It Worth? - Paul Sellers' Blog