I was looking for some advice on if anyone has used A.S. Solutions adapter for flat mount calipers, link below. This would be fitted on a 2018 Willard 3 with 160mm rotors. Also will these just mount up to the forks with the included Sram adapter.
Did you check the compatibility guide (and make the measurements) from the link you provided? That's where your real answer lies.
The other plan is to just buy a SRAM post-mount caliper and install that with your current brake. It attaches with a single bolt (already on your brake line), bleed it and you're set. I just did a quick eBay search and there's dozens sitting on there for $25-50 USD. That adapter you linked is $30 USD. Not sure what a shop would charge you for a bleed....or if you could use one anyhow.
There haven't been any changes to SRAM hydro road calipers so there's no compatibility issues. You might even be able to re-sell the flat mount caliper for the same price. That's what I did for my Shimano set when I had to replace a fork and ended up with flat mount. The adapter was $30 and a used flat mount (Shimano) caliper was the same price.
Thanks for the advice! The adapter works but pricey and like you mention it's the same price as a caliper and sounds like the best solution.. I'm able to bleed myself so that saves me that hassle. Thanks again.