How do you buy wedges to remove a chuck

[Shade Tree Welder]

Originally Posted by GWIZ

Looks like you need a large shoulder.
http://www.jacobschuck.com/drill-chuck-removal-guide

Good link Wiz.

Tackit, you don't have a shoulder, so you can not use wedges to remove it.

From the link above.

In case the mounting taper of the arbor does not provide a shoulder, a cross hole should be drilled through the neck of the arbor (illus. D.) and a cross pin inserted. Then the wedges can be used between the chuck back and the cross pin. If desired, a hole may be drilled through the soft center portion of the chuck body (Illus. D.), and a pin may then be used with an arbor press to force the arbor out of the chuck.

See the link for the pictures. Personally I would do the second option and
drill a pilot hole through the center of the chuck and drive the arbor out.