This isn’t available off the shelf, but here is one option hopefully available soon to modify the LT1 for lower color temperatures:
The simple option would be to order the MCPCB with 2700K for the “cold” emitter, and deep red for the “warm” emitter. It will compromise on CRI as you ramp to the red channel, but the combined output should warm the effective CCT on the way to red.
Somebody on reddit also recently found some Luxeon 1800K, 90 CRI emitters in the same size as the Sunlike board uses - 2835. It should be possible to install these on the Sunlike board on your own:
https://www.mouser.com/ProductDetail/Lumileds/L128-1890NA3500001?qs=pUKx8fyJudAFaiHencr3iw%3D%3D