Lone Wolf has a few conversion barrels for Glock 10 and Glock 29 pistols for $75. Limited supply. They also have a few of the same barrels coated for $85. Free shipping on orders over $25.
https://www.lonewolfdist.com/Products.aspx?CAT=241
LWD Barrel M/20 Conversion to 9x25 Extended 2 Port
LWD Barrel M/29 Conversion to 357 Sig Extended 2 Port
LWD Barrel M/29 Conversion to 9x25 Stock Length
LWD Barrel M/29 Conversion to 9x25 Extended 2 Port