The Springfield Armory Operator does and is a sweet 1911!!! I picked one up last year as my first 1911, what a great choice I made!!!
The Springfield Armory 1911 Operator does have a ramped barrel. It features a fully supported, match-grade, stainless steel barrel with an integral ramp. This design is intended to enhance durability and performance, especially in an aluminum-framed 1911. The ramped barrel is a key feature of the Operator, particularly in the 9mm version, and is designed to work seamlessly with the frame. The model below is also optics ready.
budsgunshop.com/product_info.php/products_id/170075/springfield+armory+operator+aos+45+acp+semi+auto+pistol

Try here: budsgunshop.com/product_info.php/products_id/79469/sig+sauer+1911+ca+.45+acp+5+barrel+stainless+rail+8+rounds

Good evening to you!! The Sig Sauer granite series 1911 have them if you can find one. I bought mine 20 years ago. The below link take you to the latest Sig Sauer model that has them. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'merica' 🇺🇸🇺🇸
budsgunshop.com/product_info.php/products_id/79469/sig+sauer+1911+ca+.45+acp+5+barrel+stainless+rail+8+rounds

Hi Mike and welcome. Rock Island Armory is one. You could also get a threaded barrel for a suppressor as well: hoopergunworks.com/product/rock-island-armory-1911-45-acp-5-full-size-ramped-threaded-barrel/ ----------- Cheers and stay safe!