Welcome to the forum.

Call the Dan Wesson Parts line, 607-336-1174.

I believe they are $32.00 this is for the new metal style that will
not break like the old plastic ones did. Many of the old ones sell on
Ebay but most of the time they sell for way more then they are worth,
I saw one sell last month for $86.00.

or

You can contact Genny at DW-CZ by email for part orders:

genny @ cz-usa .com (no spaces)

If memory serves me right the 14 has fixed sites and the 15 adjustable.
If I am wrong someone else will chime in.

David Carey